The Moon and the stars — November 2027
Lunar occultations of stars to magnitude 9.5, computed for your location
Every night the Moon slides in front of stars. A star doesn't fade behind it — it switches off, then switches back on at the other edge, often an hour later. Pick your place and what you observe with; the list keeps what you can realistically see.
37 occultations you can see from New Delhi with small telescope (80 mm) this month, on 15 nights · 1150 in all from there
Times in IST. A night runs from noon to noon, so an event at 01:30 stays with the evening before. On each Moon, the numbered marks show where on the limb each star disappears or reappears.
Night of Mon 1 Nov
- 118:55:42 HIP 82512 V 7.5Disappears at the dark limb
Night of Tue 2 Nov
- 118:48:44 HR 6621 V 6.3Disappears at the dark limb
- 219:40:20 HIP 87306 V 7.0Disappears at the dark limb
- 319:51:57 Gaia …3206656 V 8.0Disappears at the dark limb
Night of Wed 3 Nov
- 119:22:34 HIP 91967 V 8.3Disappears at the dark limb
Night of Thu 4 Nov
- 118:34:05 TYC 6889-612-1 V 8.0Disappears at the dark limb
Night of Fri 5 Nov
- 120:13:44 Gaia …7994112 V 8.3Disappears at the dark limb
Night of Sat 6 Nov
- 121:20:36 29 Cap V 5.3Disappears at the dark limb · reappears 22:34:57 at the bright limb
- 222:27:04 HIP 105042 V 8.1Disappears at the dark limb
Night of Sun 7 Nov
- 121:08:39 HIP 108582 V 7.9Disappears at the dark limb
Night of Tue 9 Nov
- 123:20:51 HIP 116034 V 7.2Disappears at the dark limb
- 202:21:14 HIP 116422 V 6.5Disappears at the dark limb
Night of Sat 13 Nov
- 105:45:57 HIP 13892 V 6.8Disappears at the dark limb
- 205:45:57 HIP 13892 V 6.8Disappears at the dark limb
Night of Sun 14 Nov
- 122:12:16 16 Tau V 5.5Disappears at the bright limb · reappears 23:32:53 at the dark limb
- 222:18:08 Electra (17 Tau) V 3.7Disappears at the bright limb · reappears 23:10:24 at the dark limb
- 322:36:38 Taygeta (19 Tau) V 4.3Disappears at the bright limb · reappears 23:54:20 at the dark limb
- 422:48:42 Maia (20 Tau) V 3.9Disappears at the bright limb · reappears 00:12:29 at the dark limb
- 500:21:22 21 Tau V 5.8Reappears at the dark limb
- 600:27:19 22 Tau V 6.5Reappears at the dark limb
- 700:42:41 HIP 17704 V 6.8Reappears at the dark limb
- 800:51:58 TYC 1800-1601-1 V 7.0Disappears at the dark limb · reappears 01:19:47 at the dark limb
- 901:02:47 HIP 17664 V 6.8Reappears at the dark limb
- 1001:36:23 HIP 17862 V 6.6Disappears at the dark limb · reappears 01:44:54 at the dark limb
Night of Wed 17 Nov
- 101:23:41 HIP 33419 V 6.8Reappears at the dark limb
- 203:26:48 ω Gem V 5.2Disappears at the bright limb · reappears 04:45:16 at the dark limb
Night of Fri 19 Nov
- 102:33:06 TYC 1394-1163-1 V 7.9Reappears at the dark limb
Night of Sat 20 Nov
- 100:13:08 HR 3882 V 7.0Reappears at the dark limb
- 201:25:00 Gaia …8020736 V 7.6Reappears at the dark limb
- 304:54:00 HIP 48657 V 8.1Reappears at the dark limb
Night of Sun 21 Nov
- 102:20:23 HIP 52438 V 8.3Reappears at the dark limb
- 202:26:22 Gaia …9910400 V 7.2Reappears at the dark limb
- 302:26:32 35 Sex V 6.1Reappears at the dark limb
- 403:20:29 TYC 257-246-1 V 8.5Reappears at the dark limb
- 503:44:24 HIP 52705 V 8.0Reappears at the dark limb
Night of Mon 22 Nov
- 105:18:13 HR 4484 V 6.3Reappears at the dark limb
- 205:51:26 TYC 4933-235-1 V 8.1Reappears at the dark limb
Reading the list
The Moons are drawn from LRO LOLA topography (a 40 KB relief map), lit by the Sun as it is at that moment and turned to the Moon's real libration: north up, east to the left. A dark-limb event — the star vanishing into, or popping out of, the unlit edge of the Moon — is easy to see. At the bright limb only bright stars show against the glare. PA is where on the limb it happens, measured from north through east; the cusp angle is the distance from the nearest horn of the crescent. graze marks a star passing within 3″ of the edge from your place: a few kilometres from a graze line, where it may blink several times behind mountains.
| Instrument | dark limb | bright limb |
|---|---|---|
| Naked eye | V ≤ 3.0 | V ≤ 1.0 |
| Binoculars | V ≤ 6.5 | V ≤ 3.5 |
| Small telescope (80 mm) | V ≤ 8.5 | V ≤ 5.5 |
| Telescope (200 mm) | V ≤ 9.5 | V ≤ 7.0 |
Those limits are rules of thumb: the dark-limb limit drops by 2.5 magnitudes × (lit fraction − 0.4) in moonglare and by 1 in twilight; events with the Moon under 5° are left out, and daylight events except for the brightest stars. Stars are from Gaia DR3 to G 9.5, with Hipparcos-2 for the brightest and the Yale Bright Star Catalogue for names; the Moon is from the JPL DE431 ephemeris. Times are for the Moon's mean limb, ±2 s — mountains at the edge can move a contact by a few seconds, and much more near a graze.