Planets TonightJupiter in 1991: brightness, position and events
Brightest-2.6around Feb 1
Closest (in table)4.308 au644 million km
Farthest6.365 au
Events this year2
Brightest last year-2.7
Events this year
| Date (JST) | Event | Mag | Dist (au) | Constellation | Elong. |
|---|---|---|---|---|---|
| 1991-01-29 09:26 | Opposition | -2.6 | 4.306 | Cancer | 179.2° |
| 1991-08-18 07:24 | Conjunction with the Sun | -1.7 | 6.366 | Leo | 0.8° |
Magnitude through the year (lower = brighter)
Twice-monthly position and visibility
| Date | Mag | Dist (au) | Constellation | Elong. | Visibility |
|---|---|---|---|---|---|
| Jan 1 | -2.5 | 4.420 | Cancer | 148° W | Morning sky |
| Jan 15 | -2.6 | 4.334 | Cancer | 164° W | Most of the night |
| Feb 1 | -2.6 | 4.308 | Cancer | 176° E | Most of the night |
| Feb 15 | -2.6 | 4.356 | Cancer | 160° E | Most of the night |
| Mar 1 | -2.5 | 4.460 | Cancer | 145° E | Evening sky |
| Mar 15 | -2.4 | 4.613 | Cancer | 130° E | Evening sky |
| Apr 1 | -2.3 | 4.846 | Cancer | 113° E | Evening sky |
| Apr 15 | -2.2 | 5.061 | Cancer | 99° E | Evening sky |
| May 1 | -2.1 | 5.317 | Cancer | 85° E | Evening sky |
| May 15 | -2.0 | 5.536 | Cancer | 73° E | Evening sky |
| Jun 1 | -1.9 | 5.784 | Cancer | 59° E | Evening sky |
| Jun 15 | -1.8 | 5.963 | Cancer | 48° E | Evening sky |
| Jul 1 | -1.8 | 6.133 | Cancer | 36° E | Evening sky |
| Jul 15 | -1.8 | 6.247 | Cancer | 25° E | Evening sky |
| Aug 1 | -1.7 | 6.335 | Leo | 12° E | Too close to the Sun |
| Aug 15 | -1.7 | 6.365 | Leo | 2° E | Too close to the Sun |
| Sep 1 | -1.7 | 6.346 | Leo | 11° W | Too close to the Sun |
| Sep 15 | -1.8 | 6.287 | Leo | 21° W | Morning sky |
| Oct 1 | -1.8 | 6.171 | Leo | 34° W | Morning sky |
| Oct 15 | -1.8 | 6.032 | Leo | 45° W | Morning sky |
| Nov 1 | -1.9 | 5.822 | Leo | 59° W | Morning sky |
| Nov 15 | -1.9 | 5.622 | Leo | 71° W | Morning sky |
| Dec 1 | -2.0 | 5.374 | Leo | 85° W | Morning sky |
| Dec 15 | -2.1 | 5.152 | Leo | 98° W | Morning sky |
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
Jupiter is brightest around February 1991 (magnitude -2.6); 2 conjunctions, oppositions or elongations occur this year.