IAU constellation drawing atlas
Monoceros constellation
Recognise the shape, know when the whole figure is above your horizon, and practise its 9-segment line map before you step outside.
Observation card
Monoceros at a glance
- Best evening month
- February
- Brightest anchor
- Brightest plotted star: magnitude 3.76
- Whole-figure latitude range
- -80° to 80°
- Declination span
- -9.6° to 9.9°
- Learning map
- 9 plotted stars · 9 segments
- Catalogue lineage
- plancius
How to find Monoceros
The complete figure is approximately visible between 80° south and 80° north. It is favourably placed during ordinary evening observing hours in February; the exact hour shifts through the month and with longitude.
its brightest plotted star, at visual magnitude 3.76, makes this a pattern best attempted under a dark, transparent sky. Start at the brightest anchor, then compare the direction and spacing of each neighbouring segment. A moonless night and an unobstructed horizon make the fainter links easier.
What this line map means
It is associated with the early-modern celestial charts of Petrus Plancius. Astral Nest uses a simplified IAU learning figure based on Hipparcos star positions, then projects and normalises it so the pattern is easy to trace on screen.
This diagram teaches relative shape, not absolute sky position. Rotation, scale, atmospheric extinction and local obstruction change what you see outdoors, so use a current planetarium or ephemeris for navigation.
Continue the collection
This figure is outside the current themed card sets. You can still collect it in the 85-card sky atlas.