BG Monocerotis
DSS image of BG Monocerotis
Overlaid DSS image of BG Monocerotis, 60' x 60' with north at top and west to the right

Aladin viewer for the region around BG Monocerotis
BG Mon, CCCS 621, HIP 33369, Gaia DR3 3130000164775441536

Type  Carbon Star
Magnitude  9.2
Right Ascension  6h 56' 22.8"  (2000)
Declination  7° 4' 40" N
Constellation  Monoceros
Classification  C5,2
Observing Notes

Andrew Cooper
Sep 25, 2025    Waikoloa, HI (map)
15cm f/4 Newtonian, Makaʻiki Mk2 @ 67x
Seeing: 6 Transparency: 7 Moon: 0%

Rich orange, no companion noted, faint at about 10th magnitude this morning

AAVSO data shows the star at 10th magnitude +/- half a magnitude for the last several decades

Steve Coe

Period 30 days; 9.2-10.4m
― SAC Red Star Database
Other Data Sources for BG Monocerotis
Nearby objects for BG Monocerotis
7 objects found within 120'
Biur11 Biur12 Biur7
Biur8 Czernik27 HD 50277
RV Monocerotis
Credits...

Drawings, descriptions, and CCD photos are copyright Andrew Cooper unless otherwise noted, no usage without permission.

A complete list of credits and sources can be found on the about page

BG Monocerotis