---
title: "HIP 52181"
url: "https://spacecatalog.org/object/hip-52181"
release: "DR1"
licence: "CC-BY-SA-4.0"
citation: "SpaceCatalog. HIP 52181 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hip-52181"
---

# HIP 52181

HIP 52181 is a sdOp blue subdwarf in the constellation [Ursa Major](https://spacecatalog.org/constellation/ursa-major), 1056 ly from Earth, shining at apparent magnitude 11.21 (V).

## At a glance

- **WHAT IT IS:** Blue subdwarf
- **HOW FAR:** 1056 ly — The light arriving now left it that long ago.
- **HOW BRIGHT (V):** 11.21 — A small telescope reaches it.
- **WHERE TO LOOK:** [Ursa Major](https://spacecatalog.org/constellation/ursa-major) — The patch of sky it sits in, as seen from Earth.

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | sdOp blue subdwarf |
| DISTANCE FROM EARTH | 1056 ly — by parallax |
| APPARENT MAGNITUDE (V) | 11.21 |
| ABSOLUTE MAGNITUDE (V) | 3.66 |
| CONSTELLATION | Ursa Major |
| RIGHT ASCENSION (J2000) | 10h 39m 36.7s |
| DECLINATION (J2000) | +43° 06′ 09.3″ |

## 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 | sdOp |
| Surface temperature | 50 119 K |
| Luminosity (visual) | 2.99226 L☉ |
| Surface gravity (log g) | 5.8 |

### 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) | −0.328 |
| Variable magnitude, brightest | 11.14 |
| Variable magnitude, faintest | 11.26 |

### 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) | 13.63 mas/yr |
| Proper motion (Dec) | −25.13 mas/yr |
| Radial velocity | 0 km/s |

### WHERE THESE FIGURES CAME FROM

Which catalogue, paper or model each of the fields above was read from, where the source named one.

| Field | Value |
| --- | --- |
| Spectral type from | SIMBAD (1963PASP...75..393B, quality D) |
| Stellar parameters from | Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016) |

## Also known as

- HIP: HIP 52181

## 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 52181 \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hip-52181

```bibtex
@misc{spacecatalog_hip-52181,
  author       = {{SpaceCatalog}},
  title        = {{HIP 52181}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/hip-52181},
  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-52181