---
title: "V357 Lac"
url: "https://spacecatalog.org/object/hd-212044"
release: "DR1"
licence: "CC-BY-SA-4.0"
citation: "SpaceCatalog. V357 Lac [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hd-212044"
---

# V357 Lac

V357 Lac is a B2ek blue-white [star](https://spacecatalog.org/stars) in the constellation [Lacerta](https://spacecatalog.org/constellation/lacerta), 2938 ly from Earth, shining at apparent magnitude 7.24 (V). Other catalogues list it as HD 212044 and HIP 110287.

## At a glance

- **WHAT IT IS:** Blue-white star
- **HOW FAR:** 2938 ly — The light arriving now left it that long ago.
- **HOW BRIGHT (V):** 7.24 — Binoculars reach it; the naked eye does not.
- **WHERE TO LOOK:** [Lacerta](https://spacecatalog.org/constellation/lacerta) — The patch of sky it sits in, as seen from Earth.

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | B2ek blue-white star |
| DISTANCE FROM EARTH | 2938 ly — by parallax |
| APPARENT MAGNITUDE (V) | 7.24 |
| ABSOLUTE MAGNITUDE (V) | −2.53 |
| CONSTELLATION | Lacerta |
| RIGHT ASCENSION (J2000) | 22h 20m 22.7s |
| DECLINATION (J2000) | +51° 51′ 39.6″ |

## 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 | B2ek |
| Surface temperature | 37 541 K |
| Luminosity (visual) | 897.842 L☉ |
| Radius | 6.528 R☉ |
| Surface gravity (log g) | 4.13 |
| Variability | Gamma Cassiopeiae eruptive shell star |
| Variability type (GCVS) | GCAS |

### 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) | 0.046 |
| Variable magnitude, brightest | 7.17 |
| Variable magnitude, faintest | 7.30 |

### 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) | 3.01 mas/yr |
| Proper motion (Dec) | 0.18 mas/yr |
| Radial velocity | −13.6 km/s |

### OTHER NAMES AND NUMBERS

The identifiers other catalogues file this object under, for anyone joining this data to theirs.

| Field | Value |
| --- | --- |
| Variable-star designation | V357 Lac |

### 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 (1943ApJ....97..300N, quality D) |
| Stellar parameters from | Gaia DR3 model fit (GSP-Phot, FLAME; RUWE ≤ 1.4) — low confidence: above 7,500 K GSP-Phot's temperature and extinction are degenerate |

## Also known as

- HD: HD 212044
- HIP: HIP 110287
- Variable star: V357 Lac

## 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. V357 Lac \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hd-212044

```bibtex
@misc{spacecatalog_hd-212044,
  author       = {{SpaceCatalog}},
  title        = {{V357 Lac}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/hd-212044},
  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/hd-212044