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

March 2019
  • Friday, 3/1/2019 - Io Sh/Sat Tr - Time: 02:30
    • Io's shadow transits Jupiter from 0253 to 0505. Io begins transit at 0408.
  • Friday, 3/1/2019 - CrMn vnr Sat - Time: 05:00
    • -
  • Friday, 3/1/2019 - Zod Light in W thru 3/7 - Time: 19:30
    • Look for the zodiacal light in the west after twilight from a dark site without western light pollution. Best times to look are from about 1935 to 2020.
  • Saturday, 3/2/2019 - Io OcR - Time: 03:30
    • Io appears from behind Jupiter's east limb at 0335.
  • Saturday, 3/2/2019 - CrMn vnr Ven - Time: 06:00
    • -
  • Wednesday, 3/6/2019 - New Moon - Time: 08:00
    • -
  • Thursday, 3/7/2019 - Gan EcR - Time: 04:00
    • Ganymede emerges from Jupiter's shadow 0.7 Jupiter diameter west of Jupiter.
  • Thursday, 3/7/2019 - 2.0% CrMn - Time: 18:30
    • An ultra-thin 2.0% crescent moon is 7° high 10° south of due west 30 minutes after sunset (or at 6:39pm calculated for RFO site).
  • Saturday, 3/9/2019 - Eur EcR/Oc & Io OcR - Time: 02:30
    • Sequence of events:
      0237 Europa emerges from Jupiter's shadow VERY near Jupiter's SW limb (Note: Jupiter is low in SE).
      0247 Europa disappears behind Jupiter
      0514 Europa reappears from behind Jupiter's SE limb.
      0529 Io reappears VERY near Europa.
  • Sunday, 3/10/2019 - DST begins - Time: 02:00
    • -
  • Sunday, 3/10/2019 - CrMn nr Mar - Time: 21:00
    • -
  • Tuesday, 3/12/2019 - Occ of Hyadum-II & Hyadum-I - Time: 22:30
    • Mag 3.8 Hyadum-II (delta-1 Tauri, an extremely close double) disappears behind the moon's dark limb 55° from the north cusp at 2255.
      Mag 4.8 Hyadum-I (delta-2 Tauri) disappears behind the moon's dark limb 86° from the north cusp at 2321.
      (Calculated for the RFO site using Occult4. Details will differ as distance from RFO increases.)
  • Wednesday, 3/13/2019 - Algol min - Time: 05:30
    • Algol eclipse minimum is at 0520.
  • Thursday, 3/14/2019 - 1st Qtr - Time: 03:30
    • -
  • Saturday, 3/16/2019 - Algol min - Time: 02:00
    • Algol eclipse minimum is at 0209.
  • Saturday, 3/16/2019 - Eur Ec/OcD & Io EcD - Time: 03:30
    • Sequence of events:
      0348 Europa (vnr Io) disappears into Jupiter's shadow 1 Jupiter diameter west of Jupiter.
      0455 Io follows suit 0.5 diameter west of Jupiter.
      0613 Europa emerges from the shadow VERY near Jupiter's SW limb.
      0624 Europa disappears behind Jupiter.
  • Sunday, 3/17/2019 - Io Sh/Sat Tr - Time: 02:30
    • Jupiter rises with the shadow transit in progress. Io transits from 0325 to 0536. Io's shadow transit ends at 0420.
  • Monday, 3/18/2019 - Eur & Gan Tr; Io OcR - Time: 02:30
    • Jupiter rises with the Europa and Ganymede transits in progress. Io reappears from behind Jupiter's east limb at 0251. Europa's transit ends at 0324 and Ganymede's at 0415.
  • Monday, 3/18/2019 - Algol min - Time: 23:00
    • Algol eclipse minimum is at 2258.
  • Wednesday, 3/20/2019 - Vernal Equinox - Time: 15:00
    • The equinox occurs at 2:58pm.
  • Wednesday, 3/20/2019 - "Worm" Moon - Time: 18:30
    • -
  • Thursday, 3/21/2019 - Algol min - Time: 20:00
    • Algol eclipse minimum is at 1947.
  • Saturday, 3/23/2019 - Zod Light in W thru 4/6 - Time: 21:00
    • Look for the zodiacal light in the west after twilight from a dark site without western light pollution. Best times to look are from about 2100 to 2140.
  • Sunday, 3/24/2019 - Io Sh/Sat Tr - Time: 04:00
    • Io's shadow transits Jupiter from 0403 to 0614. Io's transit begins at 0518 and is in progress at sunrise.
  • Monday, 3/25/2019 - Dbl Sh Tr, Eur Tr & Io OcR - Time: 02:00
    • Sequence of events:
      Jupiter rises with the double shadow transit in progress.
      0303 Ganymede's shadow transit ends.
      0327 Europa's shadow transit ends.
      0331 Europa's transit begins.
      0443 Io emerges from behind Jupiter's east limb.
      0555 Europa's transit ends. (3 minutes later Ganymede begins transiting.)
  • Wednesday, 3/27/2019 - Mn vnr Jup - Time: 03:00
    • -
  • Wednesday, 3/27/2019 - Last Qtr - Time: 21:00
    • -
  • Friday, 3/29/2019 - Mn vnr Sat - Time: 04:30
    • -

April 2019
  • Monday, 4/1/2019 - Dbl Sh Tr & Io EcD - Time: 03:00
    • First, Io disappears into Jupiter's shadow 0.5 Jupiter diameter west of Jupiter at 0309. Then Europa's shadow starts transiting at 0338, followed by Ganymede's shadow at 0452. Europa's shadow transit ends (and Europa's transit begins) at 0600 in nautical twilight.
  • Monday, 4/1/2019 - Zod Light in W thru 4/6 - Time: 21:00
    • Look for the zodiacal light in the west after twilight from a dark site without western light pollution. Best times to look are from about 2100 to 2140.
  • Tuesday, 4/2/2019 - Io Sh/Sat Tr - Time: 02:00
    • Jupiter rises with Io's shadow transit in progress and the satellite transit begins shortly thereafter. The shadow transit ends at 0236 and the transit ends at 0349.
  • Tuesday, 4/2/2019 - CrMn nr Ven & Mer - Time: 06:30
    • A thin crescent moon is about 5° high 19° south of due east about 25 minutes before sunrise with Venus above the moon and Mercury also 5° to the north.
  • Wednesday, 4/3/2019 - Eur OcR - Time: 03:00
    • Europa appears from behind Jupiter's SE limb at 0314.
  • Friday, 4/5/2019 - Gan EcR - Time: 02:00
    • Ganymede emerges from behind Jupiter's SE polar limb at 0204.
  • Friday, 4/5/2019 - New Moon - Time: 02:00
    • -
  • Saturday, 4/6/2019 - 3.1% CrMn in W - Time: 20:00
    • -
  • Monday, 4/8/2019 - CrMn nr Mar - Time: 21:30
    • -
  • Tuesday, 4/9/2019 - Io Sh/Sat Tr - Time: 02:00
    • Io's shadow transits from 0218 to 0430 trailed by Io itself from 0328 to 0539 (ending in astro twilight).
  • Tuesday, 4/9/2019 - Pallas opp - Time: 18:00
    • The minor planet Pallas is at opposition at mag 7.9 in Bootes, about 0.7° ESE of Muphrid. A finder's chart is essential.
  • Wednesday, 4/10/2019 - Io OcR - Time: 02:30
    • Io emerges from behind Jupiter's east limb at 0251.
  • Wednesday, 4/10/2019 - Jup stat - Time: 10:00
    • Jupiter begins retrograde motion.
  • Friday, 4/12/2019 - Gan EcR/Oc - Time: 01:00
    • With Jupiter about 5° high in the SE, Ganymede reappears from Jupiter's shadow at 0111 about 0.6 Jupiter diameter west of the SW polar limb. Then Ganymede passes behind Jupiter's south polar region from 0333 to 0546 (emerging in nautical twilight).
  • Friday, 4/12/2019 - 1st Qtr - Time: 12:00
    • -
  • Tuesday, 4/16/2019 - Io ShTr - Time: 04:00
    • Io's shadow begins transiting Jupiter at 0412. (Io itself begins transiting at 0517, in astro twilight.)
  • Tuesday, 4/16/2019 - Mar nr Aldebaran - Time: 21:30
    • Mars is near the similarly colored orange giant star Aldebaran all month, closest now. The star is the brighter of the two.
  • Wednesday, 4/17/2019 - Io EcD/OcR & Eur EcD - Time: 01:00
    • At 0123 Io disappears into Jupiter's shadow 0.4 JD west of Jupiter. Europa does the same 0.7 diameter west at 0330. Then Io emerges from behind Jupiter's east limb at 0440.
  • Friday, 4/19/2019 - Eur Tr & Gan Ec - Time: 01:30
    • Rising with the transit in progress, Europa is about half-way across Jupiter's disk by 0130. The transit ends at 0228. Then Ganymede disappears into Jupiter's shadow more than one planet diameter west of the SW polar limb at 0255 and reappears 0.4 diameter west at 0510 (in astro twilight).
  • Friday, 4/19/2019 - "Pink" Moon - Time: 04:00
    • -
  • Tuesday, 4/23/2019 - Mn Vnr Jup - Time: 04:30
    • -
  • Wednesday, 4/24/2019 - Io EcD - Time: 03:00
    • At 0317, Io disappears into Jupiter's shadow about 0.4 Jupiter diameter west of the planet.
  • Thursday, 4/25/2019 - Io Sh/Sat Tr - Time: 00:30
    • Io's shadow transits Jupiter from 0034 to 0246 followed by Io itself from 0132 to 0344.
  • Thursday, 4/25/2019 - Mn Vnr Sat - Time: 04:30
    • -
  • Friday, 4/26/2019 - Eur Sh/Sat Tr & Io OcR - Time: 00:30
    • Sequence of events:
      0034 Europa's ShTr begins
      0054 Io appears from behind Jupiter's E limb
      0225 Europa's Tr begins
      0257 Europa's ShTr ends
      0450 Europa's Tr ends (in AT)
  • Friday, 4/26/2019 - Last Qtr - Time: 15:30
    • -
  • Monday, 4/29/2019 - Sat stat - Time: 19:00
    • Saturn begins retrograde motion.
  • Monday, 4/29/2019 - Gan Tr - Time: 24:00
    • Ganymede transits Jupiter's north polar region from 0023 to 0234 on the morning of 4/30.

May 2019
  • Saturday, 5/4/2019 - New Moon - Time: 15:30
    • -
  • Saturday, 5/11/2019 - 1st Qtr - Time: 18:00
    • -
  • Saturday, 5/18/2019 - "Flower" Moon - Time: 14:00
    • -
  • Sunday, 5/26/2019 - Last Qtr - Time: 09:30
    • -

June 2019
  • Monday, 6/3/2019 - New Moon - Time: 03:00
    • -
  • Sunday, 6/9/2019 - 1st Qtr - Time: 23:00
    • -
  • Monday, 6/10/2019 - Jup opp - Time: 08:00
    • Jupiter is at opposition in Ophiuchus.
  • Monday, 6/17/2019 - "Strawberry" Moon - Time: 01:30
    • -
  • Friday, 6/21/2019 - Summer Solstice - Time: 09:00
    • The solstice occurs at 8:54am.
  • Friday, 6/21/2019 - Nep stat - Time: 21:00
    • Neptune begins retrograde motion.
  • Tuesday, 6/25/2019 - Last Qtr - Time: 03:00
    • -

July 2019
  • Tuesday, 7/2/2019 - New Moon - Time: 12:00
    • -
  • Tuesday, 7/9/2019 - 1st Qtr - Time: 04:00
    • -
  • Tuesday, 7/9/2019 - Sat opp - Time: 22:00
    • Saturn is at opposition in Sagittarius.
  • Tuesday, 7/16/2019 - "Buck" Moon - Time: 14:30
    • -
  • Wednesday, 7/24/2019 - Last Qtr - Time: 18:30
    • -
  • Wednesday, 7/31/2019 - New Moon - Time: 20:00
    • -

August 2019
  • Thursday, 8/1/2019 - Large Tides thru 8/3 - Time: 00:00
    • Large tides due to new moon 28 hours before perigee.
  • Wednesday, 8/7/2019 - 1st Qtr - Time: 10:30
    • -
  • Sunday, 8/11/2019 - Jup stat - Time: 09:00
    • Jupiter ends retrograde motion.
  • Sunday, 8/11/2019 - Ura stat - Time: 22:00
    • Uranus begins retrograde motion.
  • Tuesday, 8/13/2019 - Ven SC - Time: 23:00
    • -
  • Thursday, 8/15/2019 - "Sturgeon" Moon - Time: 05:30
    • -
  • Friday, 8/23/2019 - Last Qtr - Time: 08:00
    • -
  • Friday, 8/30/2019 - Large Tides thru 9/2 - Time: 00:00
    • Large tides due to new moon 6 hours before perigee.
  • Friday, 8/30/2019 - New Moon - Time: 03:30
    • -

September 2019
  • Sunday, 9/1/2019 - Large Tides thru 9/2 - Time: 00:00
    • Large tides due to new moon 6 hours before perigee.
  • Thursday, 9/5/2019 - 1st Qtr - Time: 20:00
    • -
  • Tuesday, 9/10/2019 - Nep opp - Time: 24:00
    • Neptune is at opposition in Aquarius.
  • Friday, 9/13/2019 - "Harvest" Moon - Time: 21:30
    • -
  • Tuesday, 9/17/2019 - Sat stat - Time: 23:00
    • Saturn ends retrograde motion.
  • Saturday, 9/21/2019 - Last Qtr - Time: 19:30
    • -
  • Monday, 9/23/2019 - Autumnal Equinox - Time: 01:00
    • The equinox occurs at 12:50am.
  • Saturday, 9/28/2019 - New Moon - Time: 11:30
    • -
  • Sunday, 9/29/2019 - Large Tides thru 10/2 - Time: 00:00
    • Large tides due to new moon 16 hours after perigee.

October 2019
  • Tuesday, 10/1/2019 - Large Tides thru 10/2 - Time: 00:00
    • Large tides due to new moon 16 hours after perigee.
  • Saturday, 10/5/2019 - 1st Qtr - Time: 10:00
    • -
  • Sunday, 10/13/2019 - "Hunter's" Moon - Time: 14:00
    • -
  • Monday, 10/21/2019 - Last Qtr - Time: 05:30
    • -
  • Sunday, 10/27/2019 - New Moon - Time: 20:30
    • -
  • Monday, 10/28/2019 - Ura opp - Time: 01:00
    • Uranus is at opposition in Aries.

November 2019
  • Sunday, 11/3/2019 - DST ends - Time: 02:00
    • -
  • Monday, 11/4/2019 - 1st Qtr - Time: 02:30
    • -
  • Tuesday, 11/12/2019 - "Beaver" Moon - Time: 05:30
    • -
  • Tuesday, 11/19/2019 - Last Qtr - Time: 13:00
    • -
  • Tuesday, 11/26/2019 - New Moon - Time: 07:00
    • -
  • Wednesday, 11/27/2019 - Nep stat - Time: 12:00
    • Neptune ends retrograde motion.

December 2019
  • Tuesday, 12/3/2019 - 1st Qtr - Time: 23:00
    • -
  • Wednesday, 12/11/2019 - "Cold" Moon - Time: 21:00
    • -
  • Wednesday, 12/18/2019 - Last Qtr - Time: 21:00
    • -
  • Saturday, 12/21/2019 - Winter Solstice - Time: 20:30
    • The solstice occurs at 8:19pm.
  • Wednesday, 12/25/2019 - New Moon - Time: 21:00
    • -

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