---
title: "HIP 39901"
url: "https://spacecatalog.org/object/hip-39901"
release: "DR1"
licence: "CC-BY-SA-4.0"
citation: "SpaceCatalog. HIP 39901 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hip-39901"
---

# HIP 39901

HIP 39901 is an M red [star](https://spacecatalog.org/stars) in the constellation [Puppis](https://spacecatalog.org/constellation/puppis), shining at apparent magnitude 8.66 (V).

## At a glance

- **WHAT IT IS:** Red star
- **HOW BRIGHT (V):** 8.66 — Binoculars reach it; the naked eye does not.
- **WHERE TO LOOK:** [Puppis](https://spacecatalog.org/constellation/puppis) — The patch of sky it sits in, as seen from Earth.

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | M red star |
| APPARENT MAGNITUDE (V) | 8.66 |
| CONSTELLATION | Puppis |
| RIGHT ASCENSION (J2000) | 08h 08m 59.4s |
| DECLINATION (J2000) | −39° 31′ 03.9″ |

## Catalogue data

### WHAT KIND OF THING IT IS

What the object is in itself, rather than how it happens to look from here.

| Field | Value |
| --- | --- |
| Spectral type | M... |

### HOW BRIGHT IT IS

What the light adds up to, measured through one filter at a time. A magnitude is a brightness on a backwards scale — the smaller the number, the brighter the object.

| Field | Value |
| --- | --- |
| Colour index (B−V) | 1.397 |

### WHERE IT IS AND HOW IT MOVES

Position, motion across the sky and the size it covers on it. These are measurements of the object as seen from here, so every one of them depends on where here is.

| Field | Value |
| --- | --- |
| Proper motion (RA) | −1.21 mas/yr |
| Proper motion (Dec) | 3.8 mas/yr |
| Radial velocity | 0 km/s |

## Also known as

- HIP: HIP 39901

## Source

[HYG Database v4.1](https://github.com/astronexus/HYG-Database) — CC-BY-SA-4.0

The producer asks: HYG Database v4.1, Astronexus (github.com/astronexus/HYG-Database). Fields derived from it stay under CC BY-SA 4.0.

How this was made: https://spacecatalog.org/methods#source-hyg

## Cite this page

SpaceCatalog. HIP 39901 \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hip-39901

```bibtex
@misc{spacecatalog_hip-39901,
  author       = {{SpaceCatalog}},
  title        = {{HIP 39901}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/hip-39901},
  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from HYG Database v4.1.}
}
```

HYG Database v4.1 — CC-BY-SA-4.0

Acknowledgement the producer asks for: HYG Database v4.1, Astronexus (github.com/astronexus/HYG-Database). Fields derived from it stay under CC BY-SA 4.0.

The page itself, with its pictures, the sky map and the observing tools: https://spacecatalog.org/object/hip-39901