Planets TonightMercury in 1990: brightness, position and events
Brightest-2.2around Jul 1
Closest (in table)0.576 au86 million km
Farthest1.434 au
Events this year13
Brightest last year-1.9
Events this year
| Date (JST) | Event | Mag | Dist (au) | Constellation | Elong. |
|---|---|---|---|---|---|
| 1990-01-09 11:03 | Inferior conjunction | +5.5 | 0.671 | Sagittarius | 2.9° |
| 1990-02-01 09:38 | Greatest western elongation (morning) | -0.0 | 0.998 | Sagittarius | 25.1° |
| 1990-03-19 11:38 | Superior conjunction | -2.0 | 1.351 | Pisces | 1.4° |
| 1990-04-14 00:31 | Greatest eastern elongation (evening) | +0.1 | 0.872 | Aries | 19.6° |
| 1990-05-04 08:49 | Inferior conjunction | +7.2 | 0.561 | Aries | 0.5° |
| 1990-05-31 11:34 | Greatest western elongation (morning) | +0.5 | 0.819 | Aries | 24.7° |
| 1990-07-03 02:21 | Superior conjunction | -2.3 | 1.327 | Gemini | 1.3° |
| 1990-08-12 05:31 | Greatest eastern elongation (evening) | +0.4 | 0.896 | Leo | 27.4° |
| 1990-09-08 12:59 | Inferior conjunction | +5.6 | 0.637 | Leo | 3.7° |
| 1990-09-24 13:00 | Greatest western elongation (morning) | -0.4 | 0.950 | Leo | 17.9° |
| 1990-10-22 13:21 | Superior conjunction | -1.6 | 1.424 | Virgo | 0.7° |
| 1990-12-06 16:39 | Greatest eastern elongation (evening) | -0.4 | 1.012 | Sagittarius | 21.1° |
| 1990-12-24 16:39 | Inferior conjunction | +5.8 | 0.676 | Sagittarius | 2.2° |
Magnitude through the year (lower = brighter)
Twice-monthly position and visibility
| Date | Mag | Dist (au) | Constellation | Elong. | Visibility |
|---|---|---|---|---|---|
| Jan 1 | +0.6 | 0.779 | Sagittarius | 15° E | Evening sky |
| Jan 15 | +1.6 | 0.704 | Sagittarius | 14° W | Too close to the Sun |
| Feb 1 | -0.0 | 1.000 | Sagittarius | 25° W | Morning sky |
| Feb 15 | -0.2 | 1.201 | Capricornus | 22° W | Morning sky |
| Mar 1 | -0.5 | 1.327 | Capricornus | 15° W | Too close to the Sun |
| Mar 15 | -1.5 | 1.365 | Aquarius | 4° W | Too close to the Sun |
| Apr 1 | -1.3 | 1.182 | Pisces | 13° E | Too close to the Sun |
| Apr 15 | +0.3 | 0.836 | Aries | 20° E | Evening sky |
| May 1 | +5.5 | 0.576 | Aries | 5° E | Too close to the Sun |
| May 15 | +2.4 | 0.599 | Aries | 16° W | Morning sky |
| Jun 1 | +0.5 | 0.837 | Aries | 25° W | Morning sky |
| Jun 15 | -0.5 | 1.104 | Taurus | 19° W | Morning sky |
| Jul 1 | -2.2 | 1.322 | Gemini | 2° W | Too close to the Sun |
| Jul 15 | -0.9 | 1.267 | Cancer | 14° E | Too close to the Sun |
| Aug 1 | +0.1 | 1.051 | Leo | 25° E | Evening sky |
| Aug 15 | +0.5 | 0.849 | Leo | 27° E | Evening sky |
| Sep 1 | +2.5 | 0.645 | Leo | 14° E | Too close to the Sun |
| Sep 15 | +1.9 | 0.723 | Sextans | 12° W | Too close to the Sun |
| Oct 1 | -1.0 | 1.139 | Leo | 16° W | Morning sky |
| Oct 15 | -1.3 | 1.375 | Virgo | 5° W | Too close to the Sun |
| Nov 1 | -0.9 | 1.434 | Libra | 6° E | Too close to the Sun |
| Nov 15 | -0.5 | 1.354 | Scorpius | 14° E | Too close to the Sun |
| Dec 1 | -0.5 | 1.123 | Sagittarius | 20° E | Evening sky |
| Dec 15 | +0.3 | 0.802 | Sagittarius | 17° E | Evening 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
Mercury is brightest around July 1990 (magnitude -2.2); 13 conjunctions, oppositions or elongations occur this year.