---
title: "NGC 4312"
url: "https://spacecatalog.org/object/ngc-4312"
release: "DR1"
licence: "CC-BY-SA-4.0"
citation: "SpaceCatalog. NGC 4312 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ngc-4312"
---

# NGC 4312

NGC 4312 is a spiral [galaxy](https://spacecatalog.org/galaxies) Sab in the constellation [Coma Berenices](https://spacecatalog.org/constellation/coma-berenices), shining at apparent magnitude 11.70 (V). Other catalogues list it as 2MASX J12223135+1532165, IRAS 12199+1548 and IRAS F12199+1548, among 8 designations in total. It was discovered in 1787.

## At a glance

- **WHAT IT IS:** Spiral galaxy
- **HOW BIG ON THE SKY:** 5.0′ — Small enough that the full Moon would cover it several times over.
- **HOW BRIGHT (V):** 11.70 — A small telescope reaches it.
- **WHERE TO LOOK:** [Coma Berenices](https://spacecatalog.org/constellation/coma-berenices) — The patch of sky it sits in, as seen from Earth.

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | Spiral galaxy Sab |
| APPARENT MAGNITUDE (V) | 11.70 |
| CONSTELLATION | Coma Berenices |
| RIGHT ASCENSION (J2000) | 12h 22m 31.4s |
| DECLINATION (J2000) | +15° 32′ 16.5″ |
| DISCOVERED | 1787 |

## 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) | 12.48 |
| Apparent magnitude (V) | 11.70 |
| Apparent magnitude (J) | 9.69 |
| Apparent magnitude (H band) | 9.02 |
| Apparent magnitude (K) | 8.79 |
| Surface brightness | 23.9 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 | 180 km/s |
| Redshift (z) | 0.0006 |
| Redshift (z, CMB frame) | 0.0016847 |
| Major axis | 5.02′ |
| Minor axis | 1.15′ |
| Position angle | 170° |

### WHEN IT WAS FOUND

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

| Field | Value |
| --- | --- |
| Discovered by | William Herschel |

### 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 | Q1110623 |
| Wikipedia article | NGC 4312 |

## Also known as

- 2MASX: 2MASX J12223135+1532165
- IRAS: IRAS 12199+1548
- IRAS: IRAS F12199+1548
- LEDA: LEDA 40095
- MCG: MCG +03-32-014
- NGC: NGC 4312
- PGC: PGC 40095
- UGC: UGC 7442

## 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 4312 \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ngc-4312

```bibtex
@misc{spacecatalog_ngc-4312,
  author       = {{SpaceCatalog}},
  title        = {{NGC 4312}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/ngc-4312},
  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-4312