---
title: "V0391 Peg"
url: "https://spacecatalog.org/object/v0391-peg"
release: "DR1"
licence: "No licence stated; acknowledgement requested"
citation: "SpaceCatalog. V0391 Peg [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/v0391-peg"
---

# V0391 Peg

V0391 Peg is a sdBV blue-white main-sequence [star](https://spacecatalog.org/stars) in the constellation [Pegasus](https://spacecatalog.org/constellation/pegasus), 3901 ly from Earth, shining at apparent magnitude 14.77 (V).

## At a glance

- **WHAT IT IS:** Blue-white main-sequence star
- **HOW FAR:** 3901 ly — The light arriving now left it that long ago.
- **HOW BRIGHT (V):** 14.77 — Faint: it takes a large telescope.
- **WHERE TO LOOK:** [Pegasus](https://spacecatalog.org/constellation/pegasus) — The patch of sky it sits in, as seen from Earth.

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | sdBV blue-white main-sequence star |
| MASS | 0.50 M☉ — NASA Exoplanet Archive composite parameters |
| DISTANCE FROM EARTH | 3901 ly — by NASA Exoplanet Archive sy\_dist (TICv8, 2019AJ....158..138S) |
| APPARENT MAGNITUDE (V) | 14.77 |
| CONSTELLATION | Pegasus |
| RIGHT ASCENSION (J2000) | 22h 04m 12.1s |
| DECLINATION (J2000) | +26° 25′ 07.8″ |

## 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 | sdBV |
| Surface temperature | 29 300 K |
| Radius | 0.23 R☉ |
| Mass | 0.5 M☉ |

### THE ORBIT

The shape of the path, where the object sits on it, and the instant those figures were true of. An orbit is a fit to observations and drifts away from the real one either side of its epoch.

| Field | Value |
| --- | --- |
| Stars in system | 1 |
| Planets in system | 1 |

### 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 |
| --- | --- |
| Stellar parameters from | NASA Exoplanet Archive composite parameters |

## Source

[NASA Exoplanet Archive (Planetary Systems Composite Parameters)](https://exoplanetarchive.ipac.caltech.edu/cgi-bin/TblView/nph-tblView?app=ExoTbls&config=PSCompPars) — No licence stated; acknowledgement requested

The producer asks: This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. Cite Christiansen et al. (2025), Planetary Science Journal (doi:10.3847/PSJ/ade3c2), and the literature reference given with each value.

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

## Cite this page

SpaceCatalog. V0391 Peg \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/v0391-peg

```bibtex
@misc{spacecatalog_v0391-peg,
  author       = {{SpaceCatalog}},
  title        = {{V0391 Peg}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/v0391-peg},
  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from NASA Exoplanet Archive (Planetary Systems Composite Parameters).}
}
```

NASA Exoplanet Archive (Planetary Systems Composite Parameters) — No licence stated; acknowledgement requested

Acknowledgement the producer asks for: This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. Cite Christiansen et al. (2025), Planetary Science Journal (doi:10.3847/PSJ/ade3c2), and the literature reference given with each value.

The page itself, with its pictures, the sky map and the observing tools: https://spacecatalog.org/object/v0391-peg