| Identification Data |
| Common Name | |
| Constellation | Apus |
| Star Name | del1Aps |
| Skymap Number | 16200091 |
| Henry Draper (HD) Number | 145366 |
| Harvard Revised (HR) Number | 6020 |
| SAO Number | 257380 |
| Durchmusterung (DM) Number | CP-78 1092 |
Washington Double Stars (WDS) Number
| 16203-7842
|
| Positional Data |
| Position and Proper Motion (PPM) Number | 373033 |
| Right Ascension (RA) J2000 | 16h 20m 20.805s |
| Declination (Dec) J2000 | -78° 41' 44.682" |
| Position Uncertainty | 0.0061s |
| Proper Motion in RA (J2000)/cos(Dec) | -0.00337 |
| Proper Motion in Dec (J2000) | -0.036666 |
| Radial Velocity | -012.0km s-1 |
| Trigonometric Parallax | +0.00426s |
| Trigonometric Parallax Uncertainty | 0.00057s |
| GCI Unit Vector in X (J2000) | -0.082572 |
| GCI Unit Vector in Y (J2000) | -0.177779 |
| GCI Unit Vector in Z (J2000) | -0.980600 |
| Galactic Longitude | 312.42° |
Galactic Latitude
| -19.89°
|
| Observational Data |
| Observed Visual Magnitude (V) | 4.74 |
| Derived Visual Magnitude | |
| Derived Visual Magnitude or Observed Visual Magnitude Uncertainty | 0.008 |
| Observed B Magnitude | 6.30 |
| Observed B-V Colour | +1.562 |
| Observed B Magnitude or (B-V) Magnitude Uncertainty | 0.010 |
| Observed U Magnitude | |
| Observed U-B Colour | |
| Observed U Magnitude or (U-B) Magnitude Uncertainty | |
| Observed Photovisual Magnitude | 4.8 |
| Observed Photographic Magnitude | |
| Morgan Keenan (MK) Spectral Type | M5IIIb |
| One-Dimensional Spectral Class | M0 |
| Position Angle | 12 |
| Year of Observation | 1918. AD |
