What’s in the Sky in December


  • 4th Partial Eclipse of the Sun. Just a small arc of the Sun will be covered by the Moon at 20:10AEDT.

















  • 4th Moon at Perigee 21:06 AEDT  Perigee distance 356,793.718km
  • 4th Mars is an early morning object  Mag. 1.6  Dist. 369,833,839 km. Tilt of North pole towards Earth is 12.6106 degrees.
  • 4th Saturn at mag. 0.7 setting at 00:23 AEDT on the 5th, Dist. 1,560,519,261km. Tilt of Saturn’s North pole towards Earth is 18.5672 degrees.
  • 4th Jupiter is an evening object setting at 01:12AEDT on the 5th,  mag. -2.3, dist. 776,514,431km, tilt of North Pole towards Earth is 0.5685 degrees.
  • 4th Mercury is an evening object very close to the Sun.
  • 4th-17th  Geminids Meteor Shower  Maximum: December 14, 07h UT ( 18Hr AEDT);  ZHR = 150; Velocity = 35 km/s. The best and most reliable of the major annual showers presently observable reaches its broad maximum on December 14 centred at 07h UT. Well north of the equator, the radiant rises about sunset, reaching a usable elevation from the local evening hours onwards. In the southern hemisphere, the radiant appears only around local midnight or so. It culminates near 02h
    local time. Even from more southerly sites, this is a splendid stream of often bright, medium-speed meteors, a rewarding event
    for all observers, whatever method they employ.
    The peak has shown little variability in its timing in recent years, with the more reliably-reported maxima during the past two decades  all having occurred around 2021 December 13, 14h to December 14, 12h UT. The peak ZHRs have shown a slight increase over a longer period and reached 140{150 in all recent years. Usually, near-peak Geminid rates persist for several hours, so much of the world has the chance to enjoy something of the shower’s best. Mass-sorting within the stream means fainter meteors should be most abundant almost a day ahead of the visual maximum. The 2021 return occurs only four days before full Moon. Depending on the latitude, the moon sets around 02h local time and leaves about 3{5 hours for observations in a dark sky. Source: IMO
  • 18th Moon at Apogee 13:16hr AEDT, Dist. 406,316.3km.
  • 17th – 24th C/2021  A1 (Leonard) is due in our skies after sunset. All being well, it may even get a little brighter than currently predicted, we will soon find out.
  • 22nd South Solstice  (or Summer Solstice in Southern Hemisphere) 03:00AEDT.  The Sun is at it’s Southern most position, -23  26′ 07.39″


Finder maps for C/2021 A1 (Leonard) below