Planetary positions on December 29, 1921

An observer located in New York City on Thursday December 29, 1921, would see:



The sun rising at 07:19 am and setting at 04:37 pm.


The moon, being 3% full, rising at 07:15 am and setting at 06:21 pm. The previous full moon was on Dec 15, 1921 while the next full moon would come on Jan 13, 1922.

The same observer would also see the other Solar System Planets as follows:



Mercury rising at 07:36 am and setting at 04:36 pm with a 99% of surface illuminated. Mercury would be orbiting the Sun at a distance of 0.45 astronomical units (AU) and would be found at a distance of 1.43 astronomical units (AU) from Earth. Given the planet elongation, the observer would see Mercury at an angle of 2° 39' 11.1" with the Sun. The brightness would be -0.81 this day, as measured by the planet magnitude.

You can also see the map of the stars on Thursday December 29, 1921 based on your location and at a specific time.

Get a star map of the sky on December 29, 1921


Venus would rise at 06:39 am and set at 03:52 pm. 98% of Venus would be illuminated by the Sun. Venus distance from the Sun would be 0.73 astronomical units (AU) and its distance from the Earth 1.68 astronomical units (AU). The angular distance in the sky between Venus and the Sun would be -9° 40' 59.9".


Mars would look like 91% full, orbiting the Sun at a distance of 1.65 AU and be at 1.78 AU from Earth. The planet would be seen rising at 02:00 am and setting at 12:48 pm. The angular separation of the Sun and the planet, with Earth as the reference point, would be -66° 02' 53.5". The brightness of Mars, that is its magnitude, would be 1.36.


Jupiter’s distance from the Sun would be 5.45 AU and 5.51 AU from Planet Earth. Jupiter rising and setting times would be 12:44 am and 12:10 pm respectively. Jupiter would appear with a 99% illuminated fraction of its surface and a magnitude (brightness of the star) of -1.81. Its angular separation between the Sun would be -81° 23' 54.6".


Saturn would rise at 11:53 pm and set at 11:52 am, appearing 99% full. The angular separation of Saturn from the Sun, as seen by the observer, would be -91° 09' 33.8", its magnitude 0.87. Saturn would orbit the Sun at a distance of 9.52 astronomical units (AU) and would be located at a distance of 9.44 astronomical units (AU) from Earth.


Uranus would appear 99 full, its brightness being 5.9. It would be seen rising at 10:27 am and setting at 09:23 pm. Uranus would be 20.07 AU far from the Sun and 20.58 AU far from Planet Earth (average distance). The observer, looking up into the sky, would see Uranus with a 57° 41' 24.5" angle of separation from the Sun.


Neptune rising at 07:30 pm, and setting at 09:35 am, its magnitude (the degree of brightness of a star) being 7.85. The difference between the celestial longitude of the Sun and that of Neptune would be -142° 53' 25.8". At 30.07 AU distance from the Sun and at 29.28 AU from Earth, 99 % of Neptune would be illuminated by the Sun.


Pluto would be seen as 99% full and would have an elongation of -176° 42' 00.6". It would orbit the Sun at an average distance of 43.11 astronomical units (AU) and be located at an average distance of 42.13 astronomical units (AU) from Earth. The observer would see Pluto rising at 04:42 pm and setting at 07:16 am, its magnitude (brightness of the star) being 15.3.

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Maps of the planetary positions

Planetary positions on December 29, 1921 - Heliocentric and Geocentric views
NB: The dimensions and the orbits of the planets are not in scale. The zodiac signs in the geocentric view are set assuming that Aries coincides with the vernal equinox and that each of the zodiac signs occupy exactly one-twelfth of the sky.

For the same New York observer looking up in the clear night sky around 10 pm of the same day, the solar system planets would be found in the following constellations and at the following coordinates:

Planet Constellation Right Ascension Declination
Mercury Sagittarius 18:46:39.57 -24:52:53.8
Venus Sagittarius 17:55:30.28 -23:26:21.7
Mars Virgo 14:02:58.80 -11:07:02.8
Jupiter Virgo 13:05:03.02 -5:31:34.4
Saturn Virgo 12:30:36.07 -0:46:05.2
Uranus Aquarius 22:34:25.60 -9:47:52.8
Neptune Cancer 9:12:00.78 16:17:48.9
Pluto Gemini 6:38:20.48 19:55:36.7

See what else happened on December 29, 1921