💫 IC 423
Object data
| Type | Emission nebula |
|---|---|
| Constellation | Orion |
| Right ascension | 5h33m22.0s (83.3415°) |
| Declination | -0°36'52" (-0.6145°) |
| Magnitude | (no magnitude data) |
| Apparent size | 6′ × 3.5′ |
| Other designations | IC 423 |
An emission nebula in Orion.
Midnight transit date (best season to observe and image)
Location: Tokyo (change)
Around Dec 10, 2026
The date it transits around midnight (transit altitude about 54°)
For about 2–3 weeks either side of this date, the object stays high from evening to dawn — its observing season.
Best time to observe tonight
Tonight (Oct 10 evening – Oct 11 dawn) · Location: Tokyo (full darkness = end of astronomical dusk to start of dawn, altitude ≥ 15°)
Moon tonight: Waning crescent (age 28.6 days, 1% illuminated) — Little moonlight — a good time for faint objects
Oct 10 23:13 – Oct 11 4:19
Hours of full darkness (end of astronomical dusk to start of dawn) when it is above 15° — the darkest sky, mostly clear of buildings and trees.
Night (sunset – sunrise)
Full darkness (dusk – dawn)
Moon up (darker = brighter moon)
Best time to observe (thick line)
Now
Sunset 17:13 → Dusk 18:37 → Dawn 4:19 → Sunrise 5:43