---
title: "IC 931"
url: "https://spacecatalog.org/object/ic-931"
release: "DR1"
licence: "CC-BY-SA-4.0"
citation: "SpaceCatalog. IC 931 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ic-931"
---

# IC 931

IC 931 is a spiral [galaxy](https://spacecatalog.org/galaxies) Sb in the constellation [Ursa Major](https://spacecatalog.org/constellation/ursa-major). Other catalogues list it as 2MASX J13434914+5537264, LEDA 2508641 and PGC 250864, among 6 designations in total.

## At a glance

- **WHAT IT IS:** Spiral galaxy
- **HOW BIG ON THE SKY:** 15″ — Small enough that the full Moon would cover it several times over.
- **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 | Spiral galaxy Sb |
| CONSTELLATION | Ursa Major |
| RIGHT ASCENSION (J2000) | 13h 43m 49.2s |
| DECLINATION (J2000) | +55° 37′ 26.3″ |

## 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 |
| --- | --- |
| Hubble type | Sb |

### 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 |
| --- | --- |
| Surface brightness | 23.11 mag/arcsec² |

### 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 |
| --- | --- |
| Major axis | 0.25′ |
| Minor axis | 0.19′ |
| Position angle | 61° |

### OTHER NAMES AND NUMBERS

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

| Field | Value |
| --- | --- |
| OpenNGC type code | G |
| Wikidata item | Q3711412 |

## Also known as

- 2MASX: 2MASX J13434914+5537264
- IC: IC 931
- LEDA: LEDA 2508641
- PGC: PGC 250864
- SDSS: SDSS J134349.18+553726.3
- SDSS: SDSS J134349.19+553726.3

## Source

[OpenNGC](https://github.com/mattiaverga/OpenNGC) — CC-BY-SA-4.0

The producer asks: OpenNGC, Mattia Verga (github.com/mattiaverga/OpenNGC). Fields derived from it stay under CC BY-SA 4.0.

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

## Cite this page

SpaceCatalog. IC 931 \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ic-931

```bibtex
@misc{spacecatalog_ic-931,
  author       = {{SpaceCatalog}},
  title        = {{IC 931}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/ic-931},
  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from OpenNGC.}
}
```

OpenNGC — CC-BY-SA-4.0

Acknowledgement the producer asks for: OpenNGC, Mattia Verga (github.com/mattiaverga/OpenNGC). 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/ic-931