WR 121-16
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Right ascension18h 51m 39.7102s[1]
Declination−05° 34′ 51.066″[1]
Apparentmagnitude(V)14.02 (13.95 - 14.14)[2]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Scutum |
| Right ascension | 18h 51m 39.7102s[1] |
| Declination | −05° 34′ 51.066″[1] |
| Apparent magnitude (V) | 14.02 (13.95 - 14.14)[2] |
| Characteristics | |
| Evolutionary stage | Wolf–Rayet[2] |
| Spectral type | WN7o/WC[2] |
| Apparent magnitude (J) | 11.369[3] |
| Apparent magnitude (K) | 10.609[3] |
| Astrometry | |
| Proper motion (μ) | RA: −2.450[1] mas/yr Dec.: −6.943[1] mas/yr |
| Parallax (π) | 0.0776±0.0156 mas[1] |
| Distance | 23,190[2] ly (7,110 pc) |
| Absolute magnitude (MV) | −3.955[2] |
| Details[2] | |
| Mass | 7.1+1.7 −1.1 M☉ |
| Radius | 4.14+1.4 −1.3 R☉ |
| Luminosity | 75,900+36,300 −22,200 L☉ |
| Temperature | 47,000+9,000 −5,000 K |
| Other designations | |
| 2MASS J18513970-0534510 | |
| Database references | |
| SIMBAD | data |
WR 121-16 is a transitional Wolf-Rayet star in the constellation of Scutum, near the Wild Duck Cluster (M11). It is located in the Far 3 kpc Arm of the Milky Way. It is very dim from Earth, having an apparent magnitude of about 14,[2] from being so reddened by interstellar extinction, and its distance of over 23,000 light years.[4] It is one of the dimmest known conventional Wolf-Rayet stars, with a luminosity of less than 76,000 times that of the Sun. WR 121-16 varies irregularly between magnitudes 13.95 and 14.14.[2]
WR 121-16 is a recent addition to the Wolf-Rayet Star Catalogue, being the 667th star added. It was discovered in August 2020.
