Monoceros
| Constellation | |
 | |
| Abbreviation | Mon |
|---|---|
| Genitive | Monocerotis |
| Pronunciation | /məˈnɒsɪrəs/, genitive /ˌmɒnəsɪˈroʊtɪs/ |
| Symbolism | the Unicorn |
| Right ascension | 7.15 |
| Declination | −5.74 |
| Quadrant | NQ2 |
| Area | 482 sq. deg. (35th) |
| Main stars | 4 |
| Bayer/Flamsteed stars | 32 |
| Stars with planets | 16 |
| Stars brighter than 3.00m | 0 |
| Stars within 10.00 pc (32.62 ly) | 2 |
| Brightest star | β Mon (3.76m) |
| Messier objects | 1 |
| Meteor showers | December Monocerids Alpha Monocerids |
| Bordering constellations | Canis Major Canis Minor Gemini Hydra Lepus Orion Puppis |
| Visible at latitudes between +75° and −90°. Best visible at 21:00 (9 p.m.) during the month of February. | |
Monoceros (Greek: Μονόκερως) is a constellation on the celestial equator.[1] Its name is Greek for 'unicorn'. It was described by 17th-century Dutch cartographer Petrus Plancius.
Location
[change | change source]Orion is to the west of Monoceros. Gemini is to the north. Canis Major is to the south. Hydra is to the east.
Other constellations next to Monoceros are Canis Minor, Lepus and Puppis.
Notable features
[change | change source]
Stars
[change | change source]Monoceros is hard to see with the naked eye. Its brightest star, Alpha Monocerotis, has a visual magnitude of 3.93. It is brighter than Gamma Monocerotis at 3.98.
Monoceros does have some interesting features to look at with a small telescope. Beta Monocerotis is a triple star system. The three stars form a triangle which looks to be in one spot. William Herschel commented that it is "one of the most beautiful sights in the heavens".[2]
V838 Monocerotis, a binary star system that used to be a triple star system, was known for a sudden outburst in size and brightness, originating from two stars merging.[3]
Monoceros also has Plaskett's Star. It is a big binary system. Its whole mass is said to be that of almost 100 Suns put together. It is as hard to find as the Cancer constellation.
References
[change | change source]- ↑ "Monoceros Constellation on Top Astronomer". www.topastronomer.com. Archived from the original on 2014-12-18. Retrieved 2014-09-16.
- ↑ http://90millimeter.org/2013/02/17/monocerotis/%5B%5D
- ↑ Kamiński, Tomek; Tylenda, Romuald; Kiljan, Aleksandra; Schmidt, Mirek; Lisiecki, Krzysztof; Melis, Carl; Frankowski, Adam; Joshi, Vishal; Menten, Karl M. (2021-11-01). "V838 Monocerotis as seen by ALMA: A remnant of a binary merger in a triple system". Astronomy & Astrophysics. 655: A32. doi:10.1051/0004-6361/202141526. ISSN 0004-6361.
Further reading
[change | change source]- Levy, David H. (2005), Deep Sky Objects, Prometheus Books, ISBN 1-59102-361-0
- Ridpath, Ian; Wil Tirion (2007). Stars and Planets Guide. London/Princeton: Collins/Princeton University Press. ISBN 978-0-00-725120-9. (Princeton).
Other websites
[change | change source]