WR 121-16

WR 121-16
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
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]
Distance23,190[2] ly
(7,110 pc)
Absolute magnitude (MV)−3.955[2]
Details[2]
Mass7.1+1.7
−1.1
 M
Radius4.14+1.4
−1.3
 R
Luminosity75,900+36,300
−22,200
 L
Temperature47,000+9,000
−5,000
 K
Other designations
2MASS J18513970-0534510
Database references
SIMBADdata

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.

  1. ^ a b c d e Cite error: The named reference edr3 was invoked but never defined (see the help page).
  2. ^ a b c d e f g Cite error: The named reference zhang2020 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference 2mass was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference wr was invoked but never defined (see the help page).