| Ephemeris for C/2021 A1 (Leonard) | ||||||||||
| Date | Time | Right | Declination | Rise | Culm | Set | Approx | Constellation | ||
| Ascension | Mag. | |||||||||
| 2021 | Dec | 07 | 19:00 EST | 15h03m08s | +19°25'24" | 02:34 | 09:49 | 17:04 | 5.8 | Bootes |
| 2021 | Dec | 08 | 19:00 EST | 15h26m58s | +15°59'52" | 03:08 | 10:09 | 17:10 | 5.8 | Serpens Caput |
| 2021 | Dec | 09 | 19:00 EST | 15h53m48s | +11°46'44" | 03:47 | 10:32 | 17:17 | 5.9 | Serpens Caput |
| 2021 | Dec | 10 | 19:00 EST | 16h23m18s | +06°46'53" | 04:31 | 10:57 | 17:24 | 6.1 | Hercules |
| 2021 | Dec | 11 | 19:00 EST | 16h54m45s | +01°11'40" | 05:18 | 11:25 | 17:32 | 6.5 | Ophiuchus |
| 2021 | Dec | 12 | 19:00 EST | 17h27m01s | -04°36'29" | 06:06 | 11:53 | 17:40 | 7.0 | Ophiuchus |
| 2021 | Dec | 13 | 19:00 EST | 17h58m47s | -10°10'14" | 06:54 | 12:21 | 17:48 | 7.4 | Serpens Cauda |
| 2021 | Dec | 14 | 19:00 EST | 18h28m49s | -15°07'11" | 07:38 | 12:47 | 17:56 | 7.2 | Scutum |
| 2021 | Dec | 15 | 19:00 EST | 18h56m16s | -19°16'14" | 08:18 | 13:10 | 18:03 | 6.9 | Sagittarius |
| 2021 | Dec | 16 | 19:00 EST | 19h20m42s | -22°36'55" | 08:53 | 13:31 | 18:09 | 6.5 | Sagittarius |
| 2021 | Dec | 17 | 19:00 EST | 19h42m01s | -25°15'04" | 09:22 | 13:48 | 18:14 | 6.3 | Sagittarius |
| 2021 | Dec | 18 | 19:00 EST | 20h00m25s | -27°18'36" | 09:46 | 14:03 | 18:19 | 6.1 | Sagittarius |
| 2021 | Dec | 19 | 19:00 EST | 20h16m11s | -28°55'07" | 10:06 | 14:14 | 18:23 | 6.0 | Sagittarius |
| 2021 | Dec | 20 | 19:00 EST | 20h29m40s | -30°11'02" | 10:22 | 14:24 | 18:26 | 5.9 | Microscopium |
| 2021 | Dec | 21 | 19:00 EST | 20h41m10s | -31°11'20" | 10:35 | 14:31 | 18:28 | 5.9 | Microscopium |
| 2021 | Dec | 22 | 19:00 EST | 20h50m59s | -31°59'46" | 10:45 | 14:37 | 18:29 | 5.8 | Microscopium |
| 2021 | Dec | 23 | 19:00 EST | 20h59m23s | -32°39'10" | 10:54 | 14:42 | 18:30 | 5.8 | Microscopium |
| 2021 | Dec | 24 | 19:00 EST | 21h06m34s | -33°11'35" | 11:00 | 14:45 | 18:30 | 5.8 | Microscopium |
| 2021 | Dec | 25 | 19:00 EST | 21h12m44s | -33°38'35" | 11:05 | 14:47 | 18:29 | 5.8 | Microscopium |
| 2021 | Dec | 26 | 19:00 EST | 21h18m00s | -34°01'19" | 11:09 | 14:48 | 18:28 | 5.8 | Microscopium |
| 2021 | Dec | 27 | 19:00 EST | 21h22m31s | -34°20'38" | 11:11 | 14:49 | 18:27 | 5.8 | Microscopium |
| 2021 | Dec | 28 | 19:00 EST | 21h26m22s | -34°37'11" | 11:13 | 14:49 | 18:25 | 5.8 | Microscopium |
| 2021 | Dec | 29 | 19:00 EST | 21h29m40s | -34°51'29" | 11:14 | 14:48 | 18:23 | 5.9 | Piscis Austrinus |
| 2021 | Dec | 30 | 19:00 EST | 21h32m27s | -35°03'55" | 11:14 | 14:47 | 18:20 | 5.9 | Piscis Austrinus |
| 2021 | Dec | 31 | 19:00 EST | 21h34m49s | -35°14'45" | 11:13 | 14:46 | 18:18 | 5.9 | Piscis Austrinus |
|
All times computed for Fairfield (latitude 41.14; longitude -73.26) and expressed in Fairfield time. Ephemeris by Dominic Ford – https://in-the-sky.org/ephemeris.php | ||||||||||