Where is Castor right now?
Castor is located in the constellation Gemini. Although Castor is currently 81° above the horizon, it is not visible because it is daytime.
Track Castor position throughout the night
← 15 September 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 04:23: 57° above the horizon toward the 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 57° toward the east, and finishes toward the north-west.
Astrometric and Physical Parameters of Castor
| Constellation | Gemini |
| Elevation | -20° |
| Direction | north-west (348°) |
| Right Ascension | 07h 34m |
| Declination | +31° 53′ |
| Magnitude | 1.58 |
Castor Passage Through Night
Double-click to unlock the map.
Current position of Castor
| Time | 18:13 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| Elevation | -20° |
| Azimuth | 348° |
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 |
|---|---|---|---|---|
| Sep 14, 12:00 | 31° | 288° | north-west | Daylight |
| Sep 14, 13:00 | 20° | 295° | north-west | Daylight |
| Sep 14, 14:00 | 9° | 303° | north-west | Daylight |
| Sep 14, 15:00 | -0° | 312° | north-west | Below horizon |
| Sep 14, 16:00 | -8° | 321° | north-west | Below horizon |
| Sep 14, 17:00 | -15° | 333° | north-west | Below horizon |
| Sep 14, 18:00 | -19° | 345° | north-west | Below horizon |
| Sep 14, 19:00 | -21° | 359° | north | Below horizon |
| Sep 14, 20:00 | -20° | 12° | north-east | Below horizon |
| Sep 14, 21:00 | -16° | 25° | north-east | Below horizon |
| Sep 14, 22:00 | -10° | 36° | north-east | Below horizon |
| Sep 14, 23:00 | -2° | 47° | north-east | Below horizon |
| Sep 15, 00:00 | 8° | 55° | north-east | Very low |
| Sep 15, 01:00 | 18° | 63° | north-east | Visible |
| Sep 15, 02:00 | 29° | 70° | north-east | Visible |
| Sep 15, 03:00 | 40° | 77° | north-east | Visible |
| Sep 15, 03:21 — Astronomical night ends | 44° | 80° | east | Visible |
| Sep 15, 03:53 — Twilight end | 51° | 83° | east | Twilight |
| Sep 15, 04:00 | 52° | 84° | east | Twilight |
| Sep 15, 04:23 — Civil sunrise | 57° | 87° | east | Twilight |
| Sep 15, 04:51 — Sunrise | 62° | 91° | east | Twilight |
| Sep 15, 05:00 | 64° | 93° | east | Daylight |
| Sep 15, 06:00 | 76° | 108° | south-east | Daylight |
| Sep 15, 07:00 | 84° | 171° | south | Daylight |
| Sep 15, 08:00 | 77° | 249° | south-west | Daylight |
| Sep 15, 09:00 | 66° | 266° | west | Daylight |
| Sep 15, 10:00 | 54° | 275° | west | Daylight |
| Sep 15, 11:00 | 42° | 282° | north-west | Daylight |
| Sep 15, 12:00 | 30° | 289° | north-west | Daylight |