---
title: "NGC 4633"
url: "https://spacecatalog.org/object/ngc-4633"
release: "DR1"
licence: "CC-BY-SA-4.0"
citation: "SpaceCatalog. NGC 4633 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ngc-4633"
---

# NGC 4633

NGC 4633 is an intermediate spiral [galaxy](https://spacecatalog.org/galaxies) SABd in the constellation [Coma Berenices](https://spacecatalog.org/constellation/coma-berenices), shining at apparent magnitude 13.12 (V). Other catalogues list it as IC 3688, IRAS F12400+1438 and LEDA 42699, among 8 designations in total. It was discovered in 1887.

## At a glance

- **WHAT IT IS:** Intermediate spiral galaxy
- **HOW BIG ON THE SKY:** 1.8′ — Small enough that the full Moon would cover it several times over.
- **HOW BRIGHT (V):** 13.12 — Faint: it takes a large telescope.
- **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 | Intermediate spiral galaxy SABd |
| APPARENT MAGNITUDE (V) | 13.12 |
| CONSTELLATION | Coma Berenices |
| RIGHT ASCENSION (J2000) | 12h 42m 37.4s |
| DECLINATION (J2000) | +14° 21′ 25.9″ |
| DISCOVERED | 1887 |

## 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 | SABd |

### 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) | 13.75 |
| Apparent magnitude (V) | 13.12 |
| Apparent magnitude (H band) | 10.27 |
| Surface brightness | 22.97 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 | 306 km/s |
| Redshift (z) | 0.00102 |
| Redshift (z, CMB frame) | 0.00207839 |
| Major axis | 1.77′ |
| Minor axis | 0.75′ |
| Position angle | 33° |

### WHEN IT WAS FOUND

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

| Field | Value |
| --- | --- |
| Discovered by | Edward D. Swift |

### 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 | Q692891 |
| Wikipedia article | NGC 4633 |

## Also known as

- IC: IC 3688
- IRAS: IRAS F12400+1438
- LEDA: LEDA 42699
- MCG: MCG +03-32-085
- NGC: NGC 4633
- PGC: PGC 42699
- SDSS: SDSS J124237.37+142125.9
- UGC: UGC 7874

## 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 4633 \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ngc-4633

```bibtex
@misc{spacecatalog_ngc-4633,
  author       = {{SpaceCatalog}},
  title        = {{NGC 4633}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/ngc-4633},
  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-4633