---
title: "NGC 5531"
url: "https://spacecatalog.org/object/ngc-5531"
release: "DR1"
licence: "CC-BY-SA-4.0"
citation: "SpaceCatalog. NGC 5531 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ngc-5531"
---

# NGC 5531

NGC 5531 is a lenticular [galaxy](https://spacecatalog.org/galaxies) S0 in the constellation [Boötes](https://spacecatalog.org/constellation/bootes), shining at apparent magnitude 14.70 (B). Other catalogues list it as 2MASX J14164323+1053070, LEDA 50999 and MCG +02-36-061, among 7 designations in total. It was discovered in 1862.

## At a glance

- **WHAT IT IS:** Lenticular galaxy
- **HOW BIG ON THE SKY:** 1.1′ — Small enough that the full Moon would cover it several times over.
- **HOW BRIGHT (B):** 14.70 — Faint: it takes a large telescope.
- **WHERE TO LOOK:** [Boötes](https://spacecatalog.org/constellation/bootes) — The patch of sky it sits in, as seen from Earth.

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | Lenticular galaxy S0 |
| APPARENT MAGNITUDE (B) | 14.70 |
| CONSTELLATION | Boötes |
| RIGHT ASCENSION (J2000) | 14h 16m 43.3s |
| DECLINATION (J2000) | +10° 53′ 05.2″ |
| DISCOVERED | 1862 |

## 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) | 14.70 |
| Apparent magnitude (J) | 11.34 |
| Apparent magnitude (H band) | 10.64 |
| Apparent magnitude (K) | 10.36 |
| Surface brightness | 23.29 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 | 1.07′ |
| Minor axis | 0.6′ |
| Position angle | 170° |

### WHEN IT WAS FOUND

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

| Field | Value |
| --- | --- |
| Discovered by | Heinrich Louis d'Arrest |

### OTHER NAMES AND NUMBERS

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

| Field | Value |
| --- | --- |
| OpenNGC type code | GPair |
| Wikidata item | Q1120797 |

## Also known as

- 2MASX: 2MASX J14164323+1053070
- LEDA: LEDA 50999
- MCG: MCG +02-36-061
- NGC: NGC 5531
- PGC: PGC 50999
- SDSS: SDSS J141643.21+105307.3
- SDSS: SDSS J141643.22+105307.4

## 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 5531 \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ngc-5531

```bibtex
@misc{spacecatalog_ngc-5531,
  author       = {{SpaceCatalog}},
  title        = {{NGC 5531}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/ngc-5531},
  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-5531