---
title: "NGC 91"
url: "https://spacecatalog.org/object/ngc-91"
release: "DR1"
licence: "CC-BY-SA-4.0"
citation: "SpaceCatalog. NGC 91 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ngc-91"
---

# NGC 91

NGC 91 is a [star](https://spacecatalog.org/stars) in the constellation [Andromeda](https://spacecatalog.org/constellation/andromeda), shining at apparent magnitude 15.20 (B). Other catalogues list it as UCAC2 39602310 and UCAC3 225-1775. It was discovered in 1854.

## At a glance

- **WHAT IT IS:** Star
- **HOW BRIGHT (B):** 15.20 — 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 | Star |
| APPARENT MAGNITUDE (B) | 15.20 |
| CONSTELLATION | Andromeda |
| RIGHT ASCENSION (J2000) | 00h 21m 51.7s |
| DECLINATION (J2000) | +22° 22′ 06.1″ |
| DISCOVERED | 1854 |

## Catalogue data

### 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) | 15.20 |
| Apparent magnitude (J) | 13.48 |
| Apparent magnitude (H band) | 13.12 |
| Apparent magnitude (K) | 13.05 |

### WHEN IT WAS FOUND

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

| Field | Value |
| --- | --- |
| Discovered by | R. J. Mitchell |

### OTHER NAMES AND NUMBERS

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

| Field | Value |
| --- | --- |
| OpenNGC type code | \* |
| Wikidata item | Q256832 |
| Wikipedia article | NGC 91 |

## Also known as

- NGC: NGC 91
- UCAC2: UCAC2 39602310
- UCAC3: UCAC3 225-1775

## 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 91 \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ngc-91

```bibtex
@misc{spacecatalog_ngc-91,
  author       = {{SpaceCatalog}},
  title        = {{NGC 91}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/ngc-91},
  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-91