20155+4743 Position and Visibility Tonight
Where is 20155+4743 right now?
20155+4743 is located in the constellation Cygnus. It is currently above the horizon at an altitude of 79° toward the north-east, with an apparent magnitude of 4.16.
Twilight begins at 18:17 local time. At that moment, 20155+4743 will be 79° above the horizon toward the north-east.
Twilight begins at 18:17 local time. At that moment, 20155+4743 will be 79° above the horizon toward the north-east.
20155+4743 visibility on 2026-10-03
20155+4743 Visible from sunset until morning twilight
20155+4743 rise and set timetable
| Time | Elevation | |
| Sunset | 16:47 | 68° |
| Civil sunset | 17:15 | 72° |
| Twilight start (−12°) | 17:45 | 76° |
| Astronomical observing session begins | 18:15 | 79° |
| 20155+4743 transit | 18:35 | 80° |
Moonrise, 56.5% illuminated  | 21:14 | 59° |
| Astronomical observing session ends | 03:38 | 4° |
| Twilight end (−12°) | 04:08 | 1° |
| 20155+4743 set | 04:22 | |
| 20155+4743 rise | 08:45 | |
| Moonset | 12:53 | 30° |
Track 20155+4743 position throughout the night
← 3 October 2026 →
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Shift the map to change the time and observe 20155+4743 changing position in the night sky.
Star system description: 20155+4743
System 20155+4743 — double star system, is located in the constellation Cygnus, at coordinates RA: 20h 15m 28s", Dec: 47° 42' 51s.
The primary and secondary magnitudes are 4.16 and 8.36. Their separation is 3.5 arcminutes, at position angle 175°. The magnitude difference is 4.2 magnitudes; the primary is approximately 47.9 times brighter.
The primary is orange; the secondary is blue-white.
The following technical data come from the Washington Double Star Catalog.
S: Different parallax and proper motion indicate a non-physical pair.
The primary and secondary magnitudes are 4.16 and 8.36. Their separation is 3.5 arcminutes, at position angle 175°. The magnitude difference is 4.2 magnitudes; the primary is approximately 47.9 times brighter.
The primary is orange; the secondary is blue-white.
The following technical data come from the Washington Double Star Catalog.
Technical details: 20155+4743
| Property | Value |
|---|---|
| System identifier | 20155+4743 |
| System type | double star system |
| Primary star | 32 Cyg |
| Right ascension (RA) | 20.25786 (20h 15m 28s") |
| Declination (Dec) | 47.71422 (47° 42' 51s) |
| Primary magnitude | 4.16 |
| Secondary magnitude | 8.36 |
| Spectral type (primary/secondary) | K7Ib+B6V (orange/blue-white) |
| Separation (arcseconds) | 208.9 |
| Position angle | 175° |
| Discovery year | 1824 |
| Last observed | 2015 |
| Primary proper motion (RA, Dec) | +000-002 |
| Secondary proper motion (RA, Dec) | +004+005 |
| Number of observations | 13 |
Notes
Data source: Washington Double Star (WDS) Catalog. Maintained by the U.S. Naval Observatory; thanks to the WDS team.
Finder Chart for 20155+4743
20155+4743 Passage Through Night
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Current position of 20155+4743
| Time | 18:17 |
| Latitude | 37.3541 |
| Longitude | -121.955 |
| Elevation | 79° |
| Azimuth | 17° |
Here you can see the current position of 20155+4743 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.
When Is 20155+4743 Visible Throughout the Year?
20155+4743 will remain visible until January 18, when it moves too close to the Sun and temporarily disappears from the night sky.
| Date | Sun, 4 October 2026 |
| Astronomical observing session begins | 18:13 |
| Astronomical observing session ends | 03:36 |
| Astronomical observing duration | 9h 23m |
| Rise | 08:45 |
| Set | 04:18 |
| Elevation at transit | 80° |
| Transit time | 18:31 |
| Equatorial coordinates | RA: 20h 15m 28s", Dec: 47° 42' 51s |
| Magnitude | 4 |
| Constellation | Cygnus |
The graph illustrates the annual visibility pattern of 20155+4743, 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 see when 20155+4743 is visible throughout the year in a table with exact rise, transit, and set times for each date.
You can also see when 20155+4743 is visible throughout the year in a table with exact rise, transit, and set times for each date.
Astrometric and Physical Parameters of 20155+4743
Coordinates and Visibility
| Right Ascension | 20h 15m 28s |
| Declination | 47° 42′ 51″ |
| Magnitude | 4.16 |
| Constellation | Cygnus |
| Elevation | 79.1° |
| Azimuth | 16.7° |