NML Cygni
Sign in to savered hypergiant star in the constellation of Cygnus
In the Vinony graph
Within Vinony's link graph, NML Cygni is referenced by 328 other articles, and connects out to year, light-year and luminosity.
It sits within the topics Astronomical objects discovered in 1965, Cygnus (constellation) and M-type hypergiants.
Its subject is documented across 36 Wikipedia language editions.
Key facts
- Constellation
- Cygnus
- Right ascension
- 20 46 25.54
- Declination
- +40 ° 06 ′ 59.5 ″
- Apparent magnitude v
- 16.60 (variable)
- Evolutionary stage
- OH/IR RHG
- Spectral type
- M4.5–M7.9 Ia–III
- Apparent magnitude k
- 0.791 ± 0.204
- Apparent magnitude j
- 4.877 ± 0.037
- Apparent magnitude h
- 2.389 ± 0.2
- B v color index
- +2.04
- Variable type
- SR
via Wikipedia infobox
Wikidata facts
- Diameter
- 1880000000
- Radius
- 1350
- Mass
- 25
- Image
- CygOB2 med.jpg
Show 11 more facts
- catalog code
- AAVSO 2042+39
- spectral class
- M7-8
- apparent magnitude
- 11.147657
- parallax
- 0.5279
- luminosity
- 230000
- right ascension component of proper motion
- -1.55
- declination component of proper motion
- -4.59
- age estimated by a dating method
- 8
- Commons category
- NML Cygni
- right ascension
- 311.60641367462
- declination
- 40.11651785812
via Wikidata · CC0
~6 min read
Encyclopedic overview
NML Cygni or V1489 Cygni (abbreviated to NML Cyg or V1489 Cyg) is a red hypergiant or red supergiant (RHG or RSG) in the constellation Cygnus. It is one of the largest known stars, and is also one of the most luminous and massive cool hypergiants, as well as one of the most luminous stars in the Milky Way.
The distance of NML Cygni from Earth is estimated to be around 1.6 kpc, about 5,300 light-years. It is a part of the Cygnus OB2 association, one of the closest massive associations to the Sun, spanning nearly 2° on the sky or ~30 pc in radius at the distance of 1.74±0.2 kpc. Based on the estimated distance and an upper limit of its angular diameter of 7.8±0.64 milliarcseconds, NML Cygni's physical radius is estimated to be no more than 1,350 R☉. If placed at the center of the Solar System, its surface would potentially extend past the orbit of Jupiter.
Excerpted from Wikipedia’s “NML Cygni” article, available under the CC BY-SA 4.0 licence.