Where is Castor right now?
Castor is located in the constellation Gemini. It is currently below the horizon and is not visible from your location.
Where and When to Look for Castor Tonight
The best available observing time for Castor during this observing period is around 04:00, at 83° 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 24-hour period, Castor moves from the north-west, reaches its highest sampled position at 83° toward the south-east, and finishes toward the north-west.
Track Castor position throughout the night
← 26 October 2026 →
| Time | |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe Castor changing position in the night sky.
Astrometric and Physical Parameters of Castor
| Constellation | Gemini |
| Elevation | -4° |
| Direction | north-east (44°) |
| 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 | 20:00 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| Elevation | -4° |
| Azimuth | 44° |
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 25, 12:00 | 3° | 309° | north-west | Daylight |
| Oct 25, 13:00 | -6° | 318° | north-west | Below horizon |
| Oct 25, 14:00 | -13° | 329° | north-west | Below horizon |
| Oct 25, 15:00 | -18° | 341° | north-west | Below horizon |
| Oct 25, 16:00 | -21° | 354° | north | Below horizon |
| Oct 25, 17:00 | -20° | 8° | north | Below horizon |
| Oct 25, 18:00 | -17° | 21° | north-east | Below horizon |
| Oct 25, 19:00 | -12° | 33° | north-east | Below horizon |
| Oct 25, 20:00 | -4° | 44° | north-east | Below horizon |
| Oct 25, 21:00 | 5° | 53° | north-east | Very low |
| Oct 25, 22:00 | 15° | 61° | north-east | Visible |
| Oct 25, 23:00 | 25° | 68° | north-east | Visible |
| Oct 26, 00:00 | 37° | 75° | north-east | Visible |
| Oct 26, 01:00 | 48° | 82° | east | Visible |
| Oct 26, 02:00 | 60° | 90° | east | Visible |
| Oct 26, 03:00 | 72° | 102° | south-east | Visible |
| Oct 26, 03:59 — Astronomical night ends | 83° | 136° | south-east | Visible |
| Oct 26, 04:00 | 83° | 138° | south-east | Visible |
| Oct 26, 04:29 — Twilight end | 84° | 195° | south-west | Twilight |
| Oct 26, 04:59 — Civil sunrise | 81° | 237° | south-west | Twilight |
| Oct 26, 05:00 | 81° | 237° | south-west | Twilight |
| Oct 26, 05:27 — Sunrise | 75° | 253° | south-west | Twilight |
| Oct 26, 06:00 | 69° | 262° | west | Daylight |
| Oct 26, 07:00 | 57° | 272° | west | Daylight |
| Oct 26, 08:00 | 45° | 280° | west | Daylight |
| Oct 26, 09:00 | 34° | 287° | north-west | Daylight |
| Oct 26, 10:00 | 23° | 294° | north-west | Daylight |
| Oct 26, 11:00 | 12° | 301° | north-west | Daylight |
| Oct 26, 12:00 | 2° | 309° | north-west | Daylight |