Star profile
19 Monocerotis
Variable starWhat is 19 Monocerotis
19 Monocerotis, listed in variable catalogues as V637 Monocerotis, is a blue star that pulses at the characteristic Beta Cephei rhythm —very fast oscillations of its entire surface—. It lies about 1,220 light-years away, in the quiet Unicorn, a modern constellation drawn in the 17th century across a stretch of sky poor in bright stars. Its blue heartbeat, invisible to the eye, is the silent pulse of a young, massive star.
Where it is and when to see it
19 Monocerotis lies in the southern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is January, when it culminates around midnight.
- From London it culminates about 34° above the horizon.
- From New York it culminates about 45° above the horizon.
- From Sydney it culminates about 60° above the horizon.
It can be seen from anywhere south of 86° N.
It ranks no. 15 in brightness among the 71 stars of Monoceros in our catalogue. To find it, start from Beta Monocerotis, the brightest: it lies about 9° away (a fist at arm's length covers about 10°).
The light you see today left it about 1,200 years ago.
It opens in your browser. Free, no account, nothing to install.
Leave your signature on 19 Monocerotis
Your name and a message go up on the map for everyone to read. Signing is free.
Without a lock, someone else can replace your signature. How the lock works
We'll ask for an email to confirm it's you, no password.
A public signature from a real person. The chosen name is a symbolic denomination within Stelvia, with no official standing or IAU recognition: the sky is not for sale and belongs to no one.
Astronomical data for 19 Monocerotis
- Constellation
- Monoceros
- Apparent magnitude
- 4.99
- Distance
- 1217.2 light years
- Coordinates (J2000)
- RA 105.728° · Dec -4.239°
- Catalogue
- HIP 33971 · HD 52918
A symbolic commemorative gift: neither the signature nor the chosen name implies ownership of the star or recognition by the IAU.
Other stars in Monoceros
Monoceros has 71 stars in Stelvia's catalogue. Here are a few of them.
- Beta Monocerotis3.76
- Alpha Monocerotis3.94
- Gamma Monocerotis3.99
- 20 Monocerotis4.91
- 3 Monocerotis4.92
- 27 Monocerotis4.93
- 2 Monocerotis5.04
- HIP 294175.06