RFO

What's Up in the Night Sky

Here's a month-by-month listing of astronomical predictions for the year, compiled by
Jack Welch, RFO astronomy instructor.

 

Abbreviations

Astr Twi/AT -Astronomical Twilight
Cal - Callisto
Civ Twi/CT - Civil Twilight
Cr - Crescent
Disap - Disappear
Dbl Tr - Double Tansit
E - End/Exit
Ec/Ecl - Eclipse
EcD - Eclipse disappearance
EcR - Eclipse reappearance
Eur - Europa
Ex - Exit
Gan - Ganymede
Gr El - Greatest Elongation
Jup - Jupiter
Lun - Lunar
Max - Maximum
Mer - Mercury
Min - Minimum
Mn - Moon
Naut Twi/NT - Nautical Twilight
Nr - Near
Occ - Occultation
OcD - Occultation disappearance
OcR - Occultation reapparance
Opp - Opposition
Pen - Penumbral
Reap - Reappear
Qtr - Quarter
Sat - Saturn /Satellite
Sh - Shadow
S/St - Start
Stat - Stationary
Tot - Total
Tr - Transit
V Nr - Very Near
Ven - Venus
Zod Lt - Zodiacal Light

 

Observing

Upcoming Observing Highlights

June 2018
  • Friday, 6/1/2018 - Mn vnr Sat - Time: 00:30
    • -
  • Saturday, 6/2/2018 - Eur Sat/Sh Tr - Time: 24:00
    • Europa transits Jupiter from 0017 (6/3) to 0229 followed by its shadow from 0126 to 0342, by which time Jupiter's altitude will be 8° (at RFO site).
  • Sunday, 6/3/2018 - Mn nr Mar - Time: 04:00
    • -
  • Monday, 6/4/2018 - Eur EcR - Time: 22:30
    • Europa emerges from Jupiter's shadow 0.4 Jupiter diameter east of Jupiter at 2249.
  • Tuesday, 6/5/2018 - Io Sat/Sh Tr - Time: 02:30
    • Io begins transiting Jupiter at 0256 followed by its shadow at 0333, by which time Jupiter's altitude is 8° (at RFO site). Jupiter sets with transits in progress.
  • Tuesday, 6/5/2018 - Io OcD/EcR - Time: 24:00
    • Io disappears behind Jupiter at 0002 (6/6) and reappears from Jupiter's shadow 0.25 Jupiter diameter east of Jupiter at 0252.
  • Wednesday, 6/6/2018 - Last Qtr - Time: 11:30
    • -
  • Wednesday, 6/6/2018 - Io Sat/Sh Tr - Time: 21:00
    • Note: This event begins in nautical twilight. Io transits Jupiter's disk from 2122 to 2331 followed by its shadow from 2201 to 0011.
  • Thursday, 6/7/2018 - Io/Gan EcR - Time: 21:00
    • This is an especially interesting event. Note that it occurs during twilight. At 2120 Io emerges from Jupiter's shadow 0.25 Jupiter diameter east of Jupiter, with Callisto to the SE. Then, at 2157 Ganymede emerges from Jupiter's shadow between Io and Callisto.
  • Sunday, 6/10/2018 - Eur Tr - Time: 02:30
    • Europa begins to transit Jupiter at 0236. Jupiter sets with the transit in progress.
  • Monday, 6/11/2018 - Eur OcD/EcR - Time: 21:30
    • At 2137 (in nautical twilight) Europa disappears behind Jupiter, then reappears from Jupiter's shadow 0.5 Jupiter diameter east of Jupiter at 0124.
  • Wednesday, 6/13/2018 - Io OcD - Time: 01:30
    • Io disappears behind Jupiter at 0149.
  • Wednesday, 6/13/2018 - New Moon - Time: 12:30
    • -
  • Wednesday, 6/13/2018 - Io Sat/Sh Tr - Time: 23:00
    • Io transits Jupiter from 2308 to 0118, followed by its shadow from 2356 to 0205.
  • Thursday, 6/14/2018 - 2.8% CrMn - Time: 21:00
    • Look for a very thin 2.8% crescent moon 6° high 27° north of due west 30 minutes after sunset (or at 2105 calculated for the RFO site).
  • Thursday, 6/14/2018 - Gan OcR/Ec & Io EcR - Time: 22:30
    • At 2233 Ganymede appears from behind the east limb of Jupiter's south polar region. At 2315 Io emerges from Jupiter's shadow 0.3 Jupiter diameter east of Jupiter. Ganymede disappears into Jupiter's shadow at 0009 then reappears about 0.9 Jupiter diameter east of the south polar region at 0156.
  • Friday, 6/15/2018 - CrMn nr Ven - Time: 21:30
    • -
  • Saturday, 6/16/2018 - CrMn nr Ven - Time: 21:30
    • -
  • Sunday, 6/17/2018 - Mn vnr Regulus - Time: 23:00
    • The moon is very near the bright blue star Regulus.
  • Monday, 6/18/2018 - Eur OcD - Time: 23:30
    • Europa disappears behind Jupiter at 2357.
  • Tuesday, 6/19/2018 - Nep stat - Time: 05:00
    • Neptune begins retrograde motion in Aquarius.
  • Tuesday, 6/19/2018 - Vesta opp - Time: 13:00
    • The minor planet Vesta is at opposition in Sagittarius at magnitude 5.3 and about 2.5° NE of 58 Oph. A finder's chart is essential for observation.
  • Tuesday, 6/19/2018 - Mer in W thru 7/17 - Time: 21:00
    • Mercury has a moderately good evening apparition, reaching a maximum altitude of 8° 40 minutes after sunset on 7/5. Brightest early on, Mercury will dim quite a bit by July, making it more difficult to spot. Look for it 30 to 40 minutes after sunset in the WNW.
  • Tuesday, 6/19/2018 - Ven Vnr M44 - Time: 22:00
    • Venus is very near the bright open star cluster M44 ("Praesepe" or "The Beehive Cluster"). Try using binoculars starting in late twilight.
  • Wednesday, 6/20/2018 - 1st Qtr - Time: 04:00
    • -
  • Wednesday, 6/20/2018 - Eur Sh Tr - Time: 21:30
    • In progress at sunset, Europa's shadow ends its transit of Jupiter at 2213.
  • Thursday, 6/21/2018 - Io Sat/Sh Tr - Time: 00:30
    • Io begins transiting Jupiter at 0056 followed by its shadow at 0150 with both continuing until close to Jupiter setting.
  • Thursday, 6/21/2018 - Summer Solstice - Time: 03:00
    • The solstice occurs at 0307.
  • Thursday, 6/21/2018 - Io OcD/EcR - Time: 22:00
    • Io disappears behind Jupiter at 2203 then reappears from Jupiter's shadow 0.4 Jupiter diameter east of Jupiter at 0110.
  • Thursday, 6/21/2018 - Gan Oc - Time: 24:00
    • Ganymede passes behind Jupiter's south polar region from 0022 (6/22) to 0205.
  • Friday, 6/22/2018 - Io Sat/Sh Tr - Time: 21:30
    • In progress at sunset, Io's transit of Jupiter ends at 2132 (nautical twilight) and its shadow transit ends at 2228 (astro twilight, at RFO site).
  • Saturday, 6/23/2018 - Mn nr Jup - Time: 21:00
    • -
  • Tuesday, 6/26/2018 - Eur OcD - Time: 02:00
    • Europa disappears behind Jupiter at 0219.
  • Wednesday, 6/27/2018 - Sat opp - Time: 06:00
    • Saturn is at opposition in Sagittarius at magnitude 0.0, a disk size of 18.4", ring diameter of 42" and the rings at near maximum tilt at 27°. Note that Saturn is very near its furthest southern declination so poorly placed for us in the north.
  • Wednesday, 6/27/2018 - Eur Sat/Sh Tr - Time: 21:30
    • Europa's transit of Jupiter is in progress at sunset. Its shadow begins transit at 2234. Europa's transit ends at 2246 and the shadow transit ends at 0059.
  • Wednesday, 6/27/2018 - "Strawberry" Moon - Time: 22:00
    • -
  • Wednesday, 6/27/2018 - Mn Vnr Sat - Time: 22:00
    • The full moon is Very near Saturn (at opposition, the planetary equivalent of a full moon).
  • Thursday, 6/28/2018 - Mar stat - Time: 07:00
    • Mars, now very bright, begins retrograde motion in Capricornus as it nears opposition.
  • Thursday, 6/28/2018 - Io OcD - Time: 23:30
    • Io disappears behind Jupiter at 2352.
  • Friday, 6/29/2018 - Io Sat/Sh Tr - Time: 21:00
    • Note that this event begins during twilight. Io transits Jupiter's disk from 2112 to 2321, followed by its shadow from 2213 to 0023.
  • Saturday, 6/30/2018 - Io EcR - Time: 21:30
    • Io emerges from Jupiter's shadow 0.4 Jupiter diameter east of Jupiter at 2134.
  • Saturday, 6/30/2018 - Mn nr Mar - Time: 24:00
    • -

July 2018
  • Sunday, 7/1/2018 - Mn nr Mar - Time: 00:30
    • -
  • Sunday, 7/1/2018 - Mer in W thru 7/17 - Time: 21:00
    • Mercury has a moderately good evening apparition, reaching a maximum altitude of 8° 40 minutes after sunset on 7/5. Brightest in late June, Mercury will dim quite a bit by July, making it more difficult to spot. Look for it 30 to 40 minutes after sunset in the WNW.
  • Monday, 7/2/2018 - Gan Sh Tr - Time: 21:30
    • This event begins during astro twilight. Ganymede's shadow transits Jupiter's north polar region from 2157 to 2343.
  • Wednesday, 7/4/2018 - Eur Sat/Sh Tr - Time: 22:30
    • Europa transits Jupiter from 2257 to 0113, followed by its shadow beginning at 0112 (by which time Jupiter is 11° high in the west). Jupiter sets with the shadow transit in progress.
  • Friday, 7/6/2018 - Last Qtr - Time: 01:00
    • -
  • Friday, 7/6/2018 - Eur EcR - Time: 22:00
    • At 2226 Europa reappears from Jupiter's shadow 0.9 Jupiter diameter east of the planet.
  • Friday, 7/6/2018 - Io Sat/Sh Tr - Time: 22:30
    • Io transits Jupiter from 2301 to 0111, followed by its shadow beginning at 0008. Jupiter sets with the shadow transit in progress.
  • Saturday, 7/7/2018 - Io EcR - Time: 23:00
    • At 2329 Io reappears from Jupiter's shadow 0.5 Jupiter diameter east of the planet.
  • Monday, 7/9/2018 - Gan Tr - Time: 21:00
    • This event begins in nautical twilight. Ganymede transits Jupiter's north polar region from 2113 to 2303.
  • Monday, 7/9/2018 - Ven Vnr Regulus & nr Mer - Time: 21:00
    • Venus is very near the bright blue star Regulus, with Mercury to the north and lower. Use binoculars to enjoy the color and help spot Mercury.
  • Tuesday, 7/10/2018 - CrMn Vnr Aldebaran - Time: 04:30
    • The crescent moon is very near the bright red-orange star Aldebaran. Use binoculars.
  • Tuesday, 7/10/2018 - Jup stat - Time: 21:00
    • Jupiter ends retrograde motion.
  • Thursday, 7/12/2018 - New Moon - Time: 20:00
    • -
  • Friday, 7/13/2018 - Large Tides thru 7/15 - Time: 00:00
    • Large tides due to new moon 5 hours before perigee.
  • Friday, 7/13/2018 - 1.7% CrMn - Time: 20:30
    • Look for an ultra-thin 1.7% crescent moon 4° high and 20° north of due west 20 minutes after sunset (or at 2054 calculated for the RFO site).
  • Friday, 7/13/2018 - Eur OcR/EcD - Time: 22:30
    • Europa reappears from behind Jupiter's SE limb at 2239 then disappears into Jupiter's shadow at 2244.
  • Saturday, 7/14/2018 - Io Tr - Time: 00:30
    • Io begins transiting Jupiter at 0052, with Jupiter 8° high in the west. Jupiter sets with the transit in progress.
  • Saturday, 7/14/2018 - 6% CrMn nr Mer - Time: 21:00
    • Try to spot Mercury below the thin crescent moon. Mercury will be 5° high 40 minutes after sunset (or at 2119 calculated for the RFO site) directly below the moon. Use binoculars.
  • Saturday, 7/14/2018 - Io OcD - Time: 21:30
    • At 2201 Io disappears behind Jupiter.
  • Sunday, 7/15/2018 - CrMn Vnr Ven & Regulus - Time: 21:00
    • The crescent moon is very near both Venus and the bright blue star Regulus. Use binoculars.
  • Sunday, 7/15/2018 - Io Sat/Sh Tr - Time: 21:00
    • The transits are in progress at sunset. Io's transit ends at 2130 (in nautical twilight at RFO) and the shadow transit ends at 2240.
  • Thursday, 7/19/2018 - 1st Qtr - Time: 13:00
    • -
  • Friday, 7/20/2018 - Gan EcR - Time: 21:30
    • Ganymede reappears from Jupiter's shadow 1.3 Jupiter diameter east of the planet at 2153 (nautical twilight at RFO).
  • Friday, 7/20/2018 - Mn nr Jup - Time: 22:00
    • The moon is near Jupiter, which is very near the bright wide double star Zubenelgenubi in Libra. Use binoculars.
  • Friday, 7/20/2018 - Eur OcD - Time: 22:30
    • At 2251 Europa disappears behind Jupiter.
  • Saturday, 7/21/2018 - Occ of eta Lib - Time: 22:00
    • At about 2221 the mag 5.4 star eta Librae disappears behind the moon's dark limb 54° from the south cusp. (Calculated using Occult4 for the RFO site. Details will differ as distance from RFO increases.)
  • Saturday, 7/21/2018 - Io OcD - Time: 23:30
    • Io disappears behind Jupiter at 2353.
  • Sunday, 7/22/2018 - Eur ShTr / Io Sat/Sh Tr - Time: 21:00
    • Europa's shadow is in transit at sunset. Io transits from 2112 (nautical twilight) to 2322. Europa's shadow transit ends at 2201 (astro twilight). Io's shadow transits from 2226 to 0035, by which time Jupiter is just 5° high (calculated for RFO).
  • Monday, 7/23/2018 - Io EcR - Time: 21:30
    • At 2149 (astro twilight) Io reappears from Jupiter's shadow 0.5 Jupiter diameter east of the planet.
  • Tuesday, 7/24/2018 - Occ of mu Sgr - Time: 20:30
    • At about 2036 the mag 3.8 star mu Sagittarii disappears behind the moon's dark limb 40° from the north cusp. Note that this occurs during civil twilight near RFO. (Calculated using Occult4 for the RFO site. Details will differ as distance from RFO increases.)
  • Tuesday, 7/24/2018 - Mn Vnr Sat - Time: 23:00
    • -
  • Thursday, 7/26/2018 - Mar opp - Time: 22:00
    • Mars is at opposition in Capricornus, reaching magnitude -2.8 and a disk size of 24.3". The southerly declination is unfavorable for those of us in the north.
  • Thursday, 7/26/2018 - Mn nr Mar - Time: 23:00
    • The nearly full moon is near Mars at opposition, a reminder that planetary opposition is analogous to a full moon.
  • Friday, 7/27/2018 - "Buck" Moon - Time: 13:30
    • This is the smallest full moon of 2018.
  • Friday, 7/27/2018 - Gan EcD - Time: 23:00
    • At 2305 Ganymede disappears into Jupiter's shadow east of Jupiter's south polar region.
  • Friday, 7/27/2018 - Mn nr Mar - Time: 23:00
    • The nearly full moon is near Mars at opposition, a reminder that planetary opposition is analogous to a full moon.
  • Sunday, 7/29/2018 - Eur ShTr & Io Sat Tr - Time: 22:00
    • Europa's shadow transit begins at 2223. Io's transit begins at 2306. Note that Io's shadow will begin transit at 0021 but Jupiter will nearly be set by then (in the RFO region).
  • Monday, 7/30/2018 - Io EcR - Time: 23:30
    • Io reappears from Jupiter's shadow 0.5 Jupiter diameter east of the planet at 2344. Note that Jupiter will be 9° high at this time (calculated for RFO).
  • Tuesday, 7/31/2018 - Mar closest - Time: 01:00
    • This is Mars's closest approach to earth since 2003 and it won't come closer again until 2035. But, due to the southerly declination, observing is less favorable for us in the north.
  • Tuesday, 7/31/2018 - Occ of psi-1&2 Aqr - Time: 01:30
    • At about 0134 the mag 4.2 star psi-1 Aquarii reappears from behind the moon's dark limb at axis angle 330° (or 37° from the north cusp). Then, at 0303 the mag 4.4 star psi-2 Aquarii reappears from behind the moon's dark limb at axis angle 248° (or 62° from the south cusp). Psi-2 Aqr is an extremely close equal double so may be observable as such for those with suitable equipment. (Calculated using Occult4 for the RFO site. Details will differ as distance from RFO increases.)

August 2018
  • Friday, 8/3/2018 - Gan OcD - Time: 22:30
    • Ganymede disappears behind Jupiter's south polar region at 2245.
  • Saturday, 8/4/2018 - Occ of xi-2 Cet - Time: 02:30
    • At about 0231 the mag 4.3 star xi-2 Ceti will reappear from behind the moon's dark limb at axis angle 308° (or 53° from the north cusp). (Calculated using Occult4 for the RFO site. Details will differ as distance from RFO increases.)
  • Saturday, 8/4/2018 - Last Qtr - Time: 11:30
    • -
  • Sunday, 8/5/2018 - Eur Tr - Time: 22:00
    • Europa begins transiting Jupiter at 2223. Jupiter sets with the transit in progress.
  • Monday, 8/6/2018 - Mn nr Aldebaran - Time: 05:30
    • The moon is near the bright red-orange star Aldebaran.
  • Monday, 8/6/2018 - Io OcD - Time: 22:00
    • Io disappears behind Jupiter at 2210.
  • Tuesday, 8/7/2018 - Ura stat - Time: 14:00
    • Uranus begins retrograde motion in Aries.
  • Tuesday, 8/7/2018 - Io Sat/Sh Tr & Eur EcR - Time: 20:30
    • Io's transit of Jupiter, in progress at sunset, ends at 2138. Io's shadow transits from 2044 to 2253. At 2202 Europa reappears from Jupiter's shadow 0.8 Jupiter diameter east of Jupiter.
  • Saturday, 8/11/2018 - Large Tides thru 8/13 - Time: 00:00
    • Large tides due to the new moon 16 hours after perigee.
  • Saturday, 8/11/2018 - New Moon - Time: 03:00
    • -
  • Sunday, 8/12/2018 - 4.5% CrMn - Time: 08:30
    • Look for a thin crescent moon in the west after sunset.
  • Sunday, 8/12/2018 - Perseids Peak - Time: 19:00
    • The peak of the Perseid Meteor Shower is expected sometime between about 1pm 8/12 and 1am 8/13, but this shower remains active for many days before and after peak. Over 100 meteors per hour are typical at the peak. The Perseids become viewable after about 11pm and are best during the a.m. hours. Conditions are ideal this year with no moonlight interference.
  • Tuesday, 8/14/2018 - Dbl Sh Tr & Eur OcR/EcD - Time: 21:00
    • Timings of these Jupiter events:
      2124 Io begins transit
      2152 Ganymede's shadow begins transit of north polar region ("above" Io)
      2208 Europa emerges from behind Jupiter's SE limb
      2220 Europa disappears into Jupiter's shadow
      2239 Io's shadow transit begins - Start of Dbl Sh Tr
      Note that Jupiter's altitude will be 10° (calculated for RFO site) by 2239.
  • Wednesday, 8/15/2018 - Io EcR - Time: 22:00
    • Io reappears from Jupiter's shadow 0.5 Jupiter diameter east of Jupiter at 2204.
  • Thursday, 8/16/2018 - Mn nr Jup - Time: 21:30
    • -
  • Saturday, 8/18/2018 - 1st Qtr - Time: 01:00
    • -
  • Monday, 8/20/2018 - Mer in E thru 9/5 - Time: 05:30
    • Mercury provides a good morning apparition from about 8/20 to 9/5 reaching a maximum altitude 45 minutes before sunrise of 8° on 8/27 & 8/28.
  • Monday, 8/20/2018 - Mn vnr Sat - Time: 24:00
    • -
  • Tuesday, 8/21/2018 - Gan Tr & Eur OcD - Time: 20:30
    • Ganymede transits Jupiter's north polar region from 2040 (nautical twilight at RFO) to 2244. At 2225 Europa disappears into Jupiter's shadow. Note that Jupiter's altitude will only be 5° by 2244 (calculated for RFO site).
  • Thursday, 8/23/2018 - Dbl Sat Tr of Jup - Time: 20:30
    • In progress at sunset, Io's shadow transit ends at 2111 and Europa's shadow transit ends at 2151.
  • Sunday, 8/26/2018 - "Sturgeon" Moon - Time: 05:00
    • -
  • Thursday, 8/30/2018 - Dbl Sat Tr & Sh Tr - Time: 20:00
    • Io and Europa are in transit of Jupiter at sunset. At 2057 Io's shadow transit begins. Io's transit ends at 2156. Europa's transit ends at 2205. Europa's shadow begins transit at 2212, starting a double shadow transit, though Jupiter will be very low in the west by this time.
  • Friday, 8/31/2018 - Io EcR - Time: 20:00
    • Io reappears from Jupiter's shadow 0.5 Jupiter diameter east of Jupiter at 2023 (nautical twilight at RFO).

September 2018
  • Saturday, 9/1/2018 - Mer in E thru 9/5 - Time: 05:30
    • Mercury concludes a good morning apparition during the first few days of this month.
  • Saturday, 9/1/2018 - Ven vnr Spica - Time: 20:30
    • Venus is very near the bright star Spica in Virgo (use binoculars), about 8° high in the SW 45 minutes after sunset. Do not confuse Venus with Jupiter, which is higher and further south.
  • Sunday, 9/2/2018 - Last Qtr - Time: 19:30
    • -
  • Monday, 9/3/2018 - Mn nr Aldebaran - Time: 01:00
    • The moon is near the bright red-orange star Aldebaran. Use binoculars.
  • Thursday, 9/6/2018 - Sat stat - Time: 03:00
    • Saturn ends retrograde motion in Sagittarius.
  • Friday, 9/7/2018 - Nep opp - Time: 11:00
    • Neptune is at opposition in Aquarius at mag 7.8 and a disk size of 2.3". Located about 70% of the way from lambda Aqr to phi Aqr, use a finder's chart for the exact position.
  • Saturday, 9/8/2018 - Zod Light in E thru 9/21 - Time: 04:30
    • The Zodiacal Light is visible in the east (at a dark site) between between about 0430 and 0515 (15 minutes later by 9/21).
  • Sunday, 9/9/2018 - New Moon - Time: 11:00
    • -
  • Monday, 9/10/2018 - 2.8% CrMn - Time: 19:30
    • Look for an ultra-thin crescent moon 6° high 13° south of due west 30 minutes after sunset (or at 1956 calculated for the RFO site). Use binoculars.
  • Thursday, 9/13/2018 - Mn nr Jup - Time: 20:00
    • -
  • Friday, 9/14/2018 - Occ of 49 Lib - Time: 21:00
    • At about 2118 the mag 5.5 star 49 Librae disappears behind the moon's dark limb 51° from the north cusp. (Calculated using Occult4 for the RFO site. Details will differ as distance from RFO increases.)
  • Sunday, 9/16/2018 - 1st Qtr - Time: 16:00
    • -
  • Wednesday, 9/19/2018 - Mn nr Mar - Time: 23:30
    • -
  • Friday, 9/21/2018 - Ven brightest - Time: 03:00
    • Venus reaches magnitude -4.8.
  • Saturday, 9/22/2018 - Autumnal Equinox - Time: 19:00
    • The equinox occurs at 1854.
  • Monday, 9/24/2018 - "Harvest" Moon - Time: 20:00
    • -
  • Sunday, 9/30/2018 - Mn vnr Aldebaran - Time: 01:00
    • The moon is very near the bright red-orange star Aldebaran. Use binoculars.

October 2018
  • Tuesday, 10/2/2018 - Last Qtr - Time: 02:30
    • -
  • Monday, 10/8/2018 - New Moon - Time: 21:00
    • -
  • Sunday, 10/14/2018 - Occ of 14 Sgr - Time: 19:00
    • At about 1928 the mag 5.5 star 14 Sagittarii disappears behind the moon's dark limb 86° from the north cusp. (Calculated using Occult4 for the RFO site. Details will differ as distance from RFO increases.)
  • Monday, 10/15/2018 - Occ of omicron Sgr - Time: 18:00
    • At about 1824 (daylight at RFO) the mag 3.8 star omicron Sagittarii disappears behind the moon's dark limb 52° from the north cusp. Then, at about 1937 the star reappears from behind the bright limb at axis angle 314° (or 47° from the north cusp). This reappearance event is challenging and requires larger aperture scopes. Tracking scopes can continue from disappearance to capture the reappearance. (Calculated using Occult4 for the RFO site. Details will differ as distance from RFO increases.)
  • Tuesday, 10/16/2018 - 1st Qtr - Time: 11:00
    • -
  • Thursday, 10/18/2018 - Occ of Nashira - Time: 21:30
    • At about 2145 the mag 3.7 star Nashira (gamma Capricorni) disappears behind the moon's dark limb 45° from the south cusp. (Calculated using Occult4 for the RFO site. Details will differ as distance from RFO increases.)
  • Saturday, 10/20/2018 - Occ of psi-1&2 Aqr - Time: 22:00
    • At about 2208 the mag 4.2 star psi-1 Aquarii disappears behind the moon's dark limb 51° from the north cusp. Then, at 2318 the mag 4.4 star psi-2 Aquarii disappears behind the moon's dark limb 47° from the south cusp. Psi-2 Aqr is an extremely close equal double so may be observable as such for those with suitable equipment. (Calculated using Occult4 for the RFO site. Details will differ as distance from RFO increases.)
  • Wednesday, 10/24/2018 - "Hunter's" Moon - Time: 09:30
    • -
  • Tuesday, 10/30/2018 - Occ of 56 Gem - Time: 00:30
    • At about 0033 the mag 5.1 star 56 Geminorum reappears from behind the moon's dark limb at axis angle 225° (or 46° from the south cusp). (Calculated using Occult4 for the RFO site. Details will differ as distance from RFO increases.)
  • Wednesday, 10/31/2018 - Last Qtr - Time: 09:30
    • -

November 2018
  • Wednesday, 11/7/2018 - New Moon - Time: 08:00
    • -
  • Wednesday, 11/14/2018 - Occ of 30 Cap - Time: 17:00
    • At about 1723 the mag 5.4 star 30 Capricorni disappears behind the moon's dark limb 63° from the north cusp. 30 Cap is an extremely close equal double so may be observable as such for those with suitable equipment. (Calculated using Occult4 for the RFO site. Details will differ as distance from RFO increases.)
  • Thursday, 11/15/2018 - 1st Qtr - Time: 07:00
    • -
  • Thursday, 11/22/2018 - "Beaver" Moon - Time: 21:30
    • -
  • Saturday, 11/24/2018 - Occ of chi-1 Ori - Time: 20:00
    • At about 2001 the mag 4.4 star chi-1 Orionis reappears from behind the moon's dark limb at axis angle 227° (or 72° from the south cusp). (Calculated using Occult4 for the RFO site. Details will differ as distance from RFO increases.)
  • Thursday, 11/29/2018 - Last Qtr - Time: 16:30
    • -

December 2018
  • Thursday, 12/6/2018 - New Moon - Time: 23:30
    • -
  • Saturday, 12/15/2018 - 1st Qtr - Time: 04:00
    • -
  • Wednesday, 12/19/2018 - Occ of mu Cet - Time: 00:30
    • At about 0044 the mag 4.3 star mu Ceti disappears behind the moon's dark limb 21° from the south cusp. Mu Cet is an extremely close multiple so may be observable as such for those with suitable equipment. (Calculated using Occult4 for the RFO site. Details will differ as distance from RFO increases.)
  • Saturday, 12/22/2018 - "Cold" Moon - Time: 10:00
    • -
  • Saturday, 12/29/2018 - Last Qtr - Time: 01:30
    • -

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