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Loading content21 Monocerotis is a main-sequence star in the constellation Monoceros (Monocerotis), lying about 284.36 light-years from Earth.
Class F. Yellow-white stars, somewhat hotter and more massive than the Sun. Such stars have surface temperatures around 6,000–7,500 K and appear yellow-white to the eye.
| Spectral type | F2V |
| Luminosity class | V |
| Apparent magnitude | 5.44 |
| Absolute magnitude | 0.74 |
| Luminosity (Sun = 1) | 44.137 |
| Colour index (B−V) | 0.31 |
| Distance | 284.36 ly (87.18 pc) |
Values are real catalogue data; fields without a reliable value are omitted, never estimated.
A main-sequence star fuses hydrogen into helium in its core. It will remain on the main sequence for most of its life before evolving into a giant.
Facts on this topic will be cited from these primary and reference sources.
Aggregated, openly-licensed star catalogue combining Hipparcos, the Yale Bright Star Catalogue, and the Gliese Catalogue of Nearby Stars.
High-precision parallax, magnitude, and position for ~118,000 stars.