16221+0102 Position and Visibility Tonight
Where is 16221+0102 right now?
16221+0102 is located in the constellation Serpens. It is currently below the horizon and is not visible from your location.
Twilight begins at 18:57 local time. At that moment, 16221+0102 will be 50° above the horizon toward the south-west.
Twilight begins at 18:57 local time. At that moment, 16221+0102 will be 50° above the horizon toward the south-west.
16221+0102 visibility on 2026-08-18
16221+0102 Visible from sunset until early morning
16221+0102 rise and set timetable
| Time | Elevation | |
Moonrise, 21% illuminated  | 09:49 | -22° |
| 16221+0102 rise | 11:41 | |
| 16221+0102 transit | 17:43 | 54° |
| Sunset | 17:55 | 54° |
| Civil sunset | 18:24 | 52° |
| Twilight start | 18:57 | 50° |
| Astronomical observing session begins | 19:32 | 46° |
| Moonset | 20:26 | 38° |
| 16221+0102 set | 23:46 | |
| Astronomical observing session ends | 02:51 | -35° |
Track 16221+0102 Position Throughout the Night
← 18 August 2026 →
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Star system description: 16221+0102
System 16221+0102 — double star system, is located in the constellation Serpens, at coordinates RA: 16h 22m 04s", Dec: 01° 01' 44s.
The primary and secondary magnitudes are 4.09 and 7.82. Their separation is 42.9 arcseconds, at position angle 133°. The magnitude difference is 3.73 magnitudes; the primary is approximately 31 times brighter.
The primary is yellow-white; the secondary is red.
The following technical data come from the Washington Double Star Catalog.
V: Proper motion indicates a physical pair.
The primary and secondary magnitudes are 4.09 and 7.82. Their separation is 42.9 arcseconds, at position angle 133°. The magnitude difference is 3.73 magnitudes; the primary is approximately 31 times brighter.
The primary is yellow-white; the secondary is red.
The following technical data come from the Washington Double Star Catalog.
Technical details: 16221+0102
| Property | Value |
|---|---|
| System identifier | 16221+0102 |
| System type | double star system |
| Primary star | Ser-16221 0102 |
| Right ascension (RA) | 16.36786 (16h 22m 04s") |
| Declination (Dec) | 1.02903 (01° 01' 44s) |
| Primary magnitude | 4.09 |
| Secondary magnitude | 7.82 |
| Spectral type (primary/secondary) | F0V+M2V (yellow-white/red) |
| Separation (arcseconds) | 42.9 |
| Position angle | 133° |
| Discovery year | 2000 |
| Last observed | 2016 |
| Primary proper motion (RA, Dec) | -158+050 |
| Secondary proper motion (RA, Dec) | -155+055 |
| Number of observations | 7 |
Notes
Data source: Washington Double Star (WDS) Catalog. Maintained by the U.S. Naval Observatory; thanks to the WDS team.
Finder Chart for
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| Object name | |
| Field of view | |
| Limiting magnitude | |
| coordinates | 16.36786, 1.02903 |
| Center coordinates | 16.36786, 1.02903 |
16221+0102 Passage Through Night
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Current position of 16221+0102
| Time | 08:46 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| Elevation | -33° |
| Azimuth | 58° |
Here you can see the current position of 16221+0102 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.
Annual motion of 16221+0102
16221+0102 will remain visible until October 14, when it moves too close to the Sun and temporarily disappears from the night sky.
| Date | Tue, 18 August 2026 |
| Twilight start | 19:28 |
| Twilight end | 02:44 |
| Twilight duration | 7h 17m |
| Rise | 11:37 |
| Set | 23:42 |
| Elevation at transit | 54° |
| Transit time | 17:40 |
| Equatorial coordinates | RA: 16h 22m 04s", Dec: 01° 01' 44s |
| Magnitude | 4 |
| Constellation | Serpens |
The graph illustrates the annual visibility pattern of 16221+0102, including its daily appearances and transit times. The vertical axis shows the hours of the day and the horizontal axis spans the year. The reddish area marks when the object is above the horizon, while the white line marks its daily transit.
You can also view detailed visibility information in a table with exact rise, transit, and set times for each date.
You can also view detailed visibility information in a table with exact rise, transit, and set times for each date.
Astrometric and Physical Parameters of 16221+0102
Coordinates and Visibility
| Right Ascension | 16.36786° |
| Declination | 1.02903° |
| Magnitude | 4.09 |
| Constellation | Serpens |
| Elevation | -33.3° |
| Azimuth | 58.1° |