Surf Wiki
Save to docs
science/astronomy

From Surf Wiki (app.surf) — the open knowledge base

20 Monocerotis

Star in the constellation Monoceros

Star in the constellation Monoceros

| b-v = +1.03 | u-b = +0.78

20 Monocerotis is a single star located about 194 light years away from the Sun in the equatorial constellation of Monoceros. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.92. The star is receding from the Earth with a heliocentric radial velocity of +78 km/s.

This object is an aging giant star with a stellar classification of K0 III. which indicates it is on the horizontal branch and is generating energy through helium fusion at its core. The star is around six billion years old with 1.1 times the mass of the Sun. After exhausting the supply of hydrogen at its core, it has expanded to 10.3 times the Sun's radius. It is radiating 46 times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,714 K.

In addition to the primary, three visual companions have been reported: component B, with magnitude 12.93 and separation 67.8", C, with magnitude 10.16 and separation 167.9", and D, with magnitude 12.46 and separation 102.3".

References

References

  1. {{cite DR2. 3059491988785706624
  2. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues.
  3. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H.
  4. (2015). "Stellar parameters and chemical abundances of 223 evolved stars with and without planets". Astronomy & Astrophysics.
  5. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters.
  6. (2015). "Stellar parameters and chemical abundances of 223 evolved stars with and without planets". Astronomy and Astrophysics.
  7. "20 Mon".
  8. (2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society.
  9. (October 2010). "High-resolution spectroscopic study of red clump stars in the Galaxy: iron-group elements". [[Monthly Notices of the Royal Astronomical Society]].
  10. (2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal.
Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

k-type-giants horizontal-branch-stars monoceros durchmusterung-objects flamsteed-objects henry-draper-catalogue-objects hipparcos-objects bright-star-catalogue-objects
Want to explore this topic further?

Ask Mako anything about 20 Monocerotis — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report