Where is Castor right now?
Castor is located in the constellation Gemini. It is currently above the horizon at an altitude of 12° toward the north-east, with an apparent magnitude of 1.58.
Twilight begins at 23:08 local time. At that moment, Castor will be 12° above the horizon toward the north-east.
Twilight begins at 23:08 local time. At that moment, Castor will be 12° above the horizon toward the north-east.
Track Castor position throughout the night
← 5 October 2026 →
| Time | |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe Castor changing position in the night sky.
Where and When to Look for Castor Tonight
The best observable position of Castor is near 04:40: 76° above the horizon toward the south-east. Status: Best view.
Castor will remain visible until May 27, when it moves too close to the Sun and temporarily disappears from the night sky. You can also see when Castor is visible throughout the year in a table with exact rise, transit, and set times for each date.
How Castor Moves Across the Sky
During this observing period, Castor moves from the north-west, reaches its highest sampled position at 76° toward the south-east, and finishes toward the north-west.
Astrometric and Physical Parameters of Castor
| Constellation | Gemini |
| Elevation | 12° |
| Direction | north-east (59°) |
| Right Ascension | 07h 34m |
| Declination | +31° 53′ |
| Magnitude | 1.58 |
Castor Passage Through Night
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Current position of Castor
| Time | 23:08 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| Elevation | 12° |
| Azimuth | 59° |
Here you can see the current position of Castor on the map, as well as its positions for rise and set. This tool lets you track its movement throughout the night with accurate, up-to-date information.
Castor Position by Hour
Select a row to move both interactive maps to that time.
| Time | Elevation | Azimuth | Direction | Visibility |
|---|---|---|---|---|
| Oct 4, 12:00 | 17° | 298° | north-west | Daylight |
| Oct 4, 13:00 | 6° | 306° | north-west | Daylight |
| Oct 4, 14:00 | -3° | 315° | north-west | Below horizon |
| Oct 4, 15:00 | -10° | 325° | north-west | Below horizon |
| Oct 4, 16:00 | -16° | 336° | north-west | Below horizon |
| Oct 4, 17:00 | -20° | 349° | north | Below horizon |
| Oct 4, 18:00 | -21° | 3° | north | Below horizon |
| Oct 4, 19:00 | -19° | 16° | north-east | Below horizon |
| Oct 4, 20:00 | -14° | 29° | north-east | Below horizon |
| Oct 4, 21:00 | -7° | 40° | north-east | Below horizon |
| Oct 4, 22:00 | 1° | 49° | north-east | Very low |
| Oct 4, 23:00 | 11° | 58° | north-east | Visible |
| Oct 5, 00:00 | 21° | 65° | north-east | Visible |
| Oct 5, 01:00 | 32° | 72° | north-east | Visible |
| Oct 5, 02:00 | 44° | 79° | east | Visible |
| Oct 5, 03:00 | 56° | 87° | east | Visible |
| Oct 5, 03:40 — Astronomical night ends | 64° | 93° | east | Visible |
| Oct 5, 04:00 | 68° | 96° | east | Visible |
| Oct 5, 04:10 — Twilight end | 70° | 99° | east | Twilight |
| Oct 5, 04:40 — Civil sunrise | 76° | 108° | south-east | Twilight |
| Oct 5, 05:00 | 79° | 117° | south-east | Twilight |
| Oct 5, 05:08 — Sunrise | 81° | 123° | south-east | Twilight |
| Oct 5, 06:00 | 84° | 210° | south-west | Daylight |
| Oct 5, 07:00 | 74° | 256° | south-west | Daylight |
| Oct 5, 08:00 | 62° | 269° | west | Daylight |
| Oct 5, 09:00 | 50° | 277° | west | Daylight |
| Oct 5, 10:00 | 38° | 284° | north-west | Daylight |
| Oct 5, 11:00 | 27° | 291° | north-west | Daylight |
| Oct 5, 12:00 | 16° | 298° | north-west | Daylight |