Planets TonightMars in 1991: brightness, position and events
Brightest-1.0around Jan 1
Closest (in table)0.679 au102 million km
Farthest2.573 au
Events this year1
Brightest last year-2.0
Events this year
| Date (JST) | Event | Mag | Dist (au) | Constellation | Elong. |
|---|---|---|---|---|---|
| 1991-11-08 18:15 | Conjunction with the Sun | +1.4 | 2.552 | Libra | 0.1° |
Magnitude through the year (lower = brighter)
Twice-monthly position and visibility
| Date | Mag | Dist (au) | Constellation | Elong. | Visibility |
|---|---|---|---|---|---|
| Jan 1 | -1.0 | 0.679 | Taurus | 138° E | Evening sky |
| Jan 15 | -0.6 | 0.789 | Taurus | 124° E | Evening sky |
| Feb 1 | -0.1 | 0.942 | Taurus | 111° E | Evening sky |
| Feb 15 | +0.2 | 1.077 | Taurus | 102° E | Evening sky |
| Mar 1 | +0.5 | 1.217 | Taurus | 94° E | Evening sky |
| Mar 15 | +0.8 | 1.358 | Taurus | 86° E | Evening sky |
| Apr 1 | +1.1 | 1.526 | Taurus | 78° E | Evening sky |
| Apr 15 | +1.2 | 1.661 | Gemini | 72° E | Evening sky |
| May 1 | +1.4 | 1.807 | Gemini | 65° E | Evening sky |
| May 15 | +1.5 | 1.928 | Gemini | 60° E | Evening sky |
| Jun 1 | +1.6 | 2.063 | Cancer | 53° E | Evening sky |
| Jun 15 | +1.7 | 2.164 | Cancer | 48° E | Evening sky |
| Jul 1 | +1.8 | 2.266 | Leo | 42° E | Evening sky |
| Jul 15 | +1.8 | 2.345 | Leo | 38° E | Evening sky |
| Aug 1 | +1.8 | 2.424 | Leo | 32° E | Evening sky |
| Aug 15 | +1.8 | 2.478 | Leo | 27° E | Evening sky |
| Sep 1 | +1.8 | 2.526 | Virgo | 22° E | Evening sky |
| Sep 15 | +1.7 | 2.553 | Virgo | 17° E | Evening sky |
| Oct 1 | +1.6 | 2.570 | Virgo | 12° E | Too close to the Sun |
| Oct 15 | +1.6 | 2.573 | Virgo | 8° E | Too close to the Sun |
| Nov 1 | +1.4 | 2.562 | Libra | 2° E | Too close to the Sun |
| Nov 15 | +1.4 | 2.541 | Libra | 2° W | Too close to the Sun |
| Dec 1 | +1.4 | 2.507 | Scorpius | 7° W | Too close to the Sun |
| Dec 15 | +1.4 | 2.468 | Ophiuchus | 11° W | Too close to the Sun |
Computed with the JPL DE421 ephemeris and Skyfield (times in JST). Magnitude and distance are for 12:00 JST on each date. Visibility is a rough guide for mid-northern latitudes such as Japan.
About this page
Mars is brightest around January 1991 (magnitude -1.0); 1 conjunctions, oppositions or elongations occur this year.