3 Monocerotis
Sign in to saveAlso known as 3 Mon, ADS 4615 A, GC 7631, ALS 15800, GCRV 3770, HD 40967, HIP 28574, HIC 28574
star in Monoceros constellation
Astronomical data · SIMBAD
- Object type
- Pu*
- Spectral type
- B5III/V
- Distance
- 935 light-years
- Redshift
- z = 0.0001300984599319488
- Coordinates
- RA 90.4601° · Dec -10.5979°
via SIMBAD · CDS Strasbourg
Key facts
- Constellation
- Monoceros
- Right ascension
- 06 01 50.42241
- Declination
- −10 ° 35 ′ 52.5565 ″
- Apparent magnitude v
- 4.92 (4.98 + 8.25)
- Spectral type
- B5 III
- U b color index
- −0.58
- B v color index
- −0.12
via Wikipedia infobox
Wikidata facts
- Instance of
- binary star
- Constellation
- Monoceros
- Distance from Earth
- 218.737
- Radius
- 5.06
- Mass
- 5.85
- Image
- NGC 2142 PanS.jpg
Show 16 more facts
- apparent magnitude
- 4.961216
- catalog code
- Gaia DR2 2999076195652281856
- spectral class
- B8
- effective temperature
- 16258
- radial velocity
- 44.5
- parallax
- 4.5717
- stellar rotational velocity
- 80
- discoverer or inventor
- John Frederick William Herschel
- time of discovery or invention
- 1831-01-06
- luminosity
- 1858
- absolute magnitude
- -1.94
- right ascension component of proper motion
- -8.282
- declination component of proper motion
- 4.385
- Commons category
- NGC 2142
- right ascension
- 90.46009134352
- declination
- -10.59793086736
via Wikidata · CC0
~1 min read
Encyclopedic overview
3 Monocerotis is a binary star system in the equatorial constellation of Monoceros, located approximately 780 light years away from the Sun based on parallax. It is visible to the naked eye as a faint, blue-white hued star with a combined apparent visual magnitude of 4.92. The system is moving further from the Earth with a heliocentric radial velocity of +39 km/s.
The magnitude 4.98 primary, designated component A, has a stellar classification of B5 III, matching an evolved blue giant star. It has 5.85 times the mass of the Sun and is radiating 1,105 times the Sun's luminosity from its photosphere at an effective temperature of 15,000 K. The companion, component B, is magnitude 7.96 with an angular separation of 1.9″ from the primary.
Excerpted from Wikipedia’s “3 Monocerotis” article, available under the CC BY-SA 4.0 licence.