Global InformationHD 183143 information
 A visual band light curve for HT Sagittae, plotted from ASAS-SN data[1] | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Sagitta |
| Right ascension | 19h 27m 26.5636s[2] |
| Declination | +18° 17′ 45.193″[2] |
| Apparent magnitude (V) | 6.71 - 6.95[3] |
| Characteristics | |
| Spectral type | B6-8 Ia-0[4] |
| Apparent magnitude (B) | 8.08 |
| Apparent magnitude (J) | 4.13 |
| Apparent magnitude (K) | 3.46 |
| U−B color index | +0.2[5] |
| B−V color index | +1.2[5] |
| Variable type | α Cyg?[3] |
| Astrometry | |
| Proper motion (μ) | RA: −1.004[2] mas/yr Dec.: −5.703[2] mas/yr |
| Parallax (π) | 0.4296 ± 0.0243 mas[2] |
| Distance | 7,600 ± 400 ly (2,300 ± 100 pc) |
| Absolute magnitude (MV) | −8.7[4] |
| Details | |
| Mass | 24.2[5] M☉ |
| Radius | 109[5] R☉ |
| Luminosity | 288,000[5] L☉ |
| Surface gravity (log g) | 1.40[6] cgs |
| Temperature | 11,500[6] K |
| Rotational velocity (v sin i) | 37[6] km/s |
| Age | 7.6[5] Myr |
| Other designations | |
HT Sge, BD+18°4085, HD 183143, HIP 95657, SAO 104860 | |
| Database references | |
| SIMBAD | data |
HD 183143 (HT Sagittae) is a blue hypergiant star located in the constellation of Sagitta.
This star has an apparent magnitude of 6.9, meaning that can be seen with the naked eye under very dark skies and that is an easy target for binoculars or a small telescope.
- ^ Cite error: The named reference
ASAS-SNwas invoked but never defined (see the help page). - ^ a b c d e Cite error: The named reference
dr3was invoked but never defined (see the help page). - ^ a b Cite error: The named reference
vsxwas invoked but never defined (see the help page). - ^ a b Cite error: The named reference
chentsovwas invoked but never defined (see the help page). - ^ a b c d e f Cite error: The named reference
webmayer2022was invoked but never defined (see the help page). - ^ a b c Cite error: The named reference
galazutdinovwas invoked but never defined (see the help page).