Custos
HR 1155 · HIP 17884 · BE Cam
👁️ Naked-eye
📋 A written introduction is coming — for now this page shows official values only.
Star
- Apparent magnitude
- 4.48 mag
- Parallax
- 4.1 mas → about 795.5 light-years away
- Spectral type
- M1III
- Right ascension
- 57.3803°
- Declination
- 65.526°
- Designation
- HR 1155
- Bayer designation
- BE Cam
- HIP number
- 17884
- IAU name adopted
- 2025-12-25
- Name language
- Latin
- Name origin (IAU)
- Custos Messium, the Harvest Keeper, was a constellation invented in Early Modern Time by the French astronomer Joseph Jérôme de Lalande (1732–1807) who might have punned with the name of his compatriot Charles Messier. Some European astronomers copied and translated it, though. The constellation became obsolete in the depolitisation of the IAU-sky and WGSN only resembles the Keeper, Custos.
Source:IAU Working Group on Star Names · checked 2026-11-02 ↗ESA Hipparcos Catalogue (ESA Gaia Archive) · checked 2026-11-03 ↗
Related
Constellation
In everyday life
- Light from this object takes about 796 years to reach Earth — the light you see tonight left around AD 1230 (official distance ÷ speed of light).
- At magnitude 4.5 it is bright enough for the naked eye (limit about 6) — look from somewhere dark.
- Declination 65.5° — from Seoul (37.6° N) it never sets and circles the northern sky all night.
Worked out from this object's official values.