---
title: "IC 3100"
url: "https://spacecatalog.org/object/ic-3100"
release: "DR1"
licence: "CC-BY-SA-4.0"
citation: "SpaceCatalog. IC 3100 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ic-3100"
---

# IC 3100

IC 3100 is a lenticular [galaxy](https://spacecatalog.org/galaxies) S0 in the constellation [Virgo](https://spacecatalog.org/constellation/virgo), shining at apparent magnitude 15.09 (B). Other catalogues list it as LEDA 39381, PGC 39381 and UGC 7312.

## At a glance

- **WHAT IT IS:** Lenticular galaxy
- **HOW BIG ON THE SKY:** 1.4′ — Small enough that the full Moon would cover it several times over.
- **HOW BRIGHT (B):** 15.09 — Faint: it takes a large telescope.
- **WHERE TO LOOK:** [Virgo](https://spacecatalog.org/constellation/virgo) — The patch of sky it sits in, as seen from Earth.

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | Lenticular galaxy S0 |
| APPARENT MAGNITUDE (B) | 15.09 |
| CONSTELLATION | Virgo |
| RIGHT ASCENSION (J2000) | 12h 17m 05.5s |
| DECLINATION (J2000) | +12° 17′ 23.4″ |

## 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 | S0 |

### 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) | 15.09 |
| Apparent magnitude (J) | 13.03 |
| Apparent magnitude (H band) | 12.51 |
| Apparent magnitude (K) | 12.38 |
| Surface brightness | 24.49 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 | 401 km/s |
| Redshift (z) | 0.00134 |
| Redshift (z, CMB frame) | 0.00245795 |
| Major axis | 1.41′ |
| Minor axis | 0.44′ |
| Position angle | 58° |

### 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 | Q3687997 |

## Also known as

- IC: IC 3100
- LEDA: LEDA 39381
- PGC: PGC 39381
- UGC: UGC 7312

## 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 3100 \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ic-3100

```bibtex
@misc{spacecatalog_ic-3100,
  author       = {{SpaceCatalog}},
  title        = {{IC 3100}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/ic-3100},
  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-3100