23159-0905 Position and Visibility Tonight
Where is 23159-0905 right now?
23159-0905 is located in the constellation Aquarius. It is currently above the horizon at an altitude of 30° toward the south-west, with an apparent magnitude of 4.36.
Twilight begins at 03:08 local time. At that moment, 23159-0905 will be 30° above the horizon toward the south-west.
Twilight begins at 03:08 local time. At that moment, 23159-0905 will be 30° above the horizon toward the south-west.
23159-0905 visibility on 2026-08-20
23159-0905 Visible from late evening until before midnight
23159-0905 rise and set timetable
| Time | Elevation | |
Moonrise, 39.4% illuminated  | 11:55 | -61° |
| 23159-0905 rise | 18:57 | |
| Astronomical observing session begins | 19:29 | 6° |
| Moonset | 21:31 | 28° |
| 23159-0905 transit | 00:28 | 44° |
| Astronomical observing session ends | 02:53 | 32° |
| Twilight end | 03:28 | 27° |
| Civil sunrise | 04:01 | 22° |
| Sunrise | 04:29 | 17° |
| 23159-0905 set | 05:59 |
Track 23159-0905 Position Throughout the Night
← 20 August 2026 →
| Time | |
| Altitude | |
| Azimuth |
Shift the map to change the time and observe 23159-0905 changing position in the night sky.
Star system description: 23159-0905
System 23159-0905 — 5-star system, is located in the constellation Aquarius, at coordinates RA: 23h 15m 53s", Dec: -9° 05' 15s.
The primary and secondary magnitudes are 4.36 and 9.88. Their separation is 49.8 arcseconds, at position angle 311°. The magnitude difference is 5.52 magnitudes; the primary is approximately 161.4 times brighter.
Both components are orange.
The following technical data come from the Washington Double Star Catalog.
V: Proper motion indicates a physical pair.
The primary and secondary magnitudes are 4.36 and 9.88. Their separation is 49.8 arcseconds, at position angle 311°. The magnitude difference is 5.52 magnitudes; the primary is approximately 161.4 times brighter.
Both components are orange.
The following technical data come from the Washington Double Star Catalog.
Technical details: 23159-0905
| Property | Value |
|---|---|
| System identifier | 23159-0905 |
| System type | 5-star system |
| Primary star | 91 Aqr |
| Right ascension (RA) | 23.26486 (23h 15m 53s") |
| Declination (Dec) | -9.08775 (-9° 05' 15s) |
| Primary magnitude | 4.36 |
| Secondary magnitude | 9.88 |
| Spectral type (primary/secondary) | K1III+K3 (orange/orange) |
| Separation (arcseconds) | 49.8 |
| Position angle | 311° |
| Discovery year | 1824 |
| Last observed | 2016 |
| Primary proper motion (RA, Dec) | +369-017 |
| Secondary proper motion (RA, Dec) | +370-017 |
| Number of observations | 55 |
Components of 23159-0905
| Component | Magnitude | Separation (arcseconds) | Position angle |
| A,BC | 9.88 | 49.8 | 311 |
| AD | 13.49 | 63.0 | 275 |
| BC | 10.7 | 0.1 | 267 |
| BC,E | 14.3 | 18.4 | 35 |
Notes
Data source: Washington Double Star (WDS) Catalog. Maintained by the U.S. Naval Observatory; thanks to the WDS team.
Finder Chart for 91 Aqr
Double-click to unlock the map.
| Object name | 91 Aqr |
| Field of view | |
| Limiting magnitude | |
| 91 Aqr coordinates | 23.26486, -9.08775 |
| Center coordinates | 23.26486, -9.08775 |
23159-0905 Passage Through Night
Double-click to unlock the map.
Current position of 23159-0905
| Time | 03:08 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| Elevation | 30° |
| Azimuth | 227° |
Here you can see the current position of 23159-0905 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 23159-0905
23159-0905 will remain visible until January 19, when it moves too close to the Sun and temporarily disappears from the night sky.
| Date | Fri, 21 August 2026 |
| Twilight start | 19:23 |
| Twilight end | 02:48 |
| Twilight duration | 7h 25m |
| Rise | 18:53 |
| Set | 05:55 |
| Elevation at transit | 44° |
| Transit time | 00:24 |
| Equatorial coordinates | RA: 23h 15m 53s", Dec: -9° 05' 15s |
| Magnitude | 4 |
| Constellation | Aquarius |
The graph illustrates the annual visibility pattern of 23159-0905, 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 23159-0905
Coordinates and Visibility
| Right Ascension | 23.26486° |
| Declination | -9.08775° |
| Magnitude | 4.36 |
| Constellation | Aquarius |
| Elevation | 30.4° |
| Azimuth | 227.4° |