December 2021

1. Sun
2. Mon
3. Tue
4. Wed
5. Thu
6. Fri
7. Sat
11. 1 10%
12. 2 4%
13. 3 1%
14. 4 New
15. 5 3%
16. 6 9%
17. 7 16%
18. 8 26%
19. 9 36%
20. 10 First qtr
21. 11 57%
22. 12 66%
23. 13 75%
24. 14 83%
25. 15 90%
26. 16 95%
27. 17 98%
28. 18 Full
29. 19 100%
30. 20 98%
31. 21 94%
32. 22 89%
33. 23 82%
34. 24 74%
35. 25 65%
36. 26 Last qtr
37. 27 44%
38. 28 33%
39. 29 23%
40. 30 13%
41. 31 6%

• Moon phase
• Perigee or apogee
• Eclipse
• Planets
• Equinox or solstice

Events in December 2021

1. Thu, Dec 27:45 PM

   Moon and Mars close together

   They pass 0.7° apart in the sky.

2. Sat, Dec 42:33 AM

   Total solar eclipse

   The Moon covers the Sun completely along a narrow track across Earth.

3. Sat, Dec 42:43 AM

   New Moon

   The Moon passes between Earth and the Sun and cannot be seen. These are the darkest nights of the month.

4. Sat, Dec 4

   Perigee

   The Moon's closest point to Earth on this orbit: 356,800 km.

5. Sat, Dec 47:43 AM

   Moon and Mercury close together

   They pass 0.0° apart in the sky.

6. Mon, Dec 68:21 PM

   Moon and Venus close together

   They pass 1.9° apart in the sky.

7. Tue, Dec 712:48 PM

   Venus at its brightest

   Shines at magnitude -4.9, as bright as it gets this time around.

8. Tue, Dec 710:43 PM

   Moon and Saturn close together

   They pass 4.1° apart in the sky.

9. Thu, Dec 93:52 AM

   Moon and Jupiter close together

   They pass 4.2° apart in the sky.

10. Fri, Dec 108:36 PM

    First Quarter

    Half of the disc is lit. The Moon is high at sunset and sets around midnight.

11. Fri, Dec 1010:50 PM

    Moon and Neptune close together

    They pass 3.9° apart in the sky.

12. Wed, Dec 151:50 AM

    Moon and Uranus close together

    They pass 1.4° apart in the sky.

13. Fri, Dec 17

    Apogee

    The Moon's farthest point from Earth on this orbit: 406,300 km.

14. Sat, Dec 1811:36 PM

    Full Moon Cold MoonMicromoon

    The whole disc is lit. The Moon rises around sunset and stays up all night.

15. Tue, Dec 2110:59 AM

    December solstice

    The shortest day in the northern hemisphere and the longest in the southern.

16. Sun, Dec 269:24 PM

    Last Quarter

    Half of the disc is lit. The Moon rises around midnight and is up through the morning.

17. Wed, Dec 295:28 AM

    Mercury and Venus close together

    They pass 4.2° apart in the sky.

18. Fri, Dec 313:01 PM

    Moon and Mars close together

    They pass 0.9° apart in the sky.

Times are local to America/New York. Each Moon is drawn as it looks at midday.