Every ingress of the Sun and planets, chronologically, with the exact UTC instant. Retrograde re-entries are marked.
In 1990 the Sun and planets change signs 46 times. Outer-planet ingresses: Jupiter enters Leo on Aug 18, 1990, 07:30 UTC.
| Instant (UTC) | Planet | From | Into |
|---|---|---|---|
| Jan 16, 1990, 15:23 UTC | ♀ Venus ℞ | Aquarius | Capricorn |
| Jan 20, 1990, 08:01 UTC | ☉ Sun | Capricorn | Aquarius |
| Jan 29, 1990, 14:10 UTC | ♂ Mars | Sagittarius | Capricorn |
| Feb 12, 1990, 01:11 UTC | ☿ Mercury | Capricorn | Aquarius |
| Feb 18, 1990, 22:14 UTC | ☉ Sun | Aquarius | Pisces |
| Mar 3, 1990, 17:15 UTC | ☿ Mercury | Aquarius | Pisces |
| Mar 3, 1990, 17:52 UTC | ♀ Venus | Capricorn | Aquarius |
| Mar 11, 1990, 15:54 UTC | ♂ Mars | Capricorn | Aquarius |
| Mar 20, 1990, 00:05 UTC | ☿ Mercury | Pisces | Aries |
| Mar 20, 1990, 21:19 UTC | ☉ Sun | Pisces | Aries |
| Apr 4, 1990, 07:35 UTC | ☿ Mercury | Aries | Taurus |
| Apr 6, 1990, 09:13 UTC | ♀ Venus | Aquarius | Pisces |
| Apr 20, 1990, 08:27 UTC | ☉ Sun | Aries | Taurus |
| Apr 20, 1990, 22:09 UTC | ♂ Mars | Aquarius | Pisces |
| May 4, 1990, 03:52 UTC | ♀ Venus | Pisces | Aries |
| May 21, 1990, 07:37 UTC | ☉ Sun | Taurus | Gemini |
| May 30, 1990, 10:13 UTC | ♀ Venus | Aries | Taurus |
| May 31, 1990, 07:11 UTC | ♂ Mars | Pisces | Aries |
| Jun 12, 1990, 00:29 UTC | ☿ Mercury | Taurus | Gemini |
| Jun 21, 1990, 15:33 UTC | ☉ Sun | Gemini | Cancer |
| Jun 25, 1990, 00:14 UTC | ♀ Venus | Taurus | Gemini |
| Jun 27, 1990, 20:46 UTC | ☿ Mercury | Gemini | Cancer |
| Jul 11, 1990, 23:48 UTC | ☿ Mercury | Cancer | Leo |
| Jul 12, 1990, 14:43 UTC | ♂ Mars | Aries | Taurus |
| Jul 20, 1990, 03:41 UTC | ♀ Venus | Gemini | Cancer |
| Jul 23, 1990, 02:22 UTC | ☉ Sun | Cancer | Leo |
| Jul 29, 1990, 11:10 UTC | ☿ Mercury | Leo | Virgo |
| Aug 13, 1990, 22:05 UTC | ♀ Venus | Cancer | Leo |
| Aug 18, 1990, 07:30 UTC | ♃ Jupiter | Cancer | Leo |
| Aug 23, 1990, 09:21 UTC | ☉ Sun | Leo | Virgo |
| Aug 31, 1990, 11:39 UTC | ♂ Mars | Taurus | Gemini |
| Sep 7, 1990, 08:21 UTC | ♀ Venus | Leo | Virgo |
| Sep 23, 1990, 06:55 UTC | ☉ Sun | Virgo | Libra |
| Oct 1, 1990, 12:13 UTC | ♀ Venus | Virgo | Libra |
| Oct 5, 1990, 17:44 UTC | ☿ Mercury | Virgo | Libra |
| Oct 23, 1990, 01:46 UTC | ☿ Mercury | Libra | Scorpio |
| Oct 23, 1990, 16:14 UTC | ☉ Sun | Libra | Scorpio |
| Oct 25, 1990, 12:03 UTC | ♀ Venus | Libra | Scorpio |
| Nov 11, 1990, 00:06 UTC | ☿ Mercury | Scorpio | Sagittarius |
| Nov 18, 1990, 09:58 UTC | ♀ Venus | Scorpio | Sagittarius |
| Nov 22, 1990, 13:47 UTC | ☉ Sun | Scorpio | Sagittarius |
| Dec 2, 1990, 00:13 UTC | ☿ Mercury | Sagittarius | Capricorn |
| Dec 12, 1990, 07:18 UTC | ♀ Venus | Sagittarius | Capricorn |
| Dec 14, 1990, 07:46 UTC | ♂ Mars ℞ | Gemini | Taurus |
| Dec 22, 1990, 03:07 UTC | ☉ Sun | Sagittarius | Capricorn |
| Dec 25, 1990, 22:57 UTC | ☿ Mercury ℞ | Capricorn | Sagittarius |