---
title: "NGC 184"
url: "https://spacecatalog.org/object/ngc-184"
release: "DR1"
licence: "CC-BY-SA-4.0"
citation: "SpaceCatalog. NGC 184 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ngc-184"
---

# NGC 184

NGC 184 is a spiral [galaxy](https://spacecatalog.org/galaxies) Sab in the constellation [Andromeda](https://spacecatalog.org/constellation/andromeda), 232.6 Mly from Earth, shining at apparent magnitude 15.46 (B). Other catalogues list it as 2MASX J00383575+2926514, LEDA 2309 and PGC 2309. It was discovered in 1883.

## At a glance

- **WHAT IT IS:** Spiral galaxy
- **HOW FAR:** 232.6 Mly — A luminosity distance, from its redshift — how faint it looks. The light itself left 242 million years ago.
- **HOW BIG ON THE SKY:** 44″ — Small enough that the full Moon would cover it several times over.
- **HOW BRIGHT (B):** 15.46 — Faint: it takes a large telescope.
- **WHERE TO LOOK:** [Andromeda](https://spacecatalog.org/constellation/andromeda) — The patch of sky it sits in, as seen from Earth.

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | Spiral galaxy Sab |
| DISTANCE FROM EARTH | 232.6 Mly ±17 — by redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc |
| APPARENT MAGNITUDE (B) | 15.46 |
| CONSTELLATION | Andromeda |
| RIGHT ASCENSION (J2000) | 00h 38m 35.8s |
| DECLINATION (J2000) | +29° 26′ 51.4″ |
| DISCOVERED | 1883 |

## 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 | Sab |

### 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 |
| --- | --- |
| Apparent magnitude (B) | 15.46 |
| Apparent magnitude (J) | 12.09 |
| Apparent magnitude (H band) | 11.41 |
| Apparent magnitude (K) | 11.12 |
| 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 |
| --- | --- |
| Radial velocity | 5210 km/s |
| Redshift (z) | 0.017532 |
| Redshift (z, CMB frame) | 0.0164493 |
| Major axis | 0.73′ |
| Minor axis | 0.27′ |
| Position angle | 8° |

### WHEN IT WAS FOUND

Who first saw it, from where, and by what method.

| Field | Value |
| --- | --- |
| Discovered by | Édouard Stephan |

### 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 | Q1035683 |
| Wikipedia article | NGC 184 |

## Also known as

- 2MASX: 2MASX J00383575+2926514
- LEDA: LEDA 2309
- NGC: NGC 184
- PGC: PGC 2309

## 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. NGC 184 \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ngc-184

```bibtex
@misc{spacecatalog_ngc-184,
  author       = {{SpaceCatalog}},
  title        = {{NGC 184}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/ngc-184},
  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/ngc-184