---
title: "NGC 7577"
url: "https://spacecatalog.org/object/ngc-7577"
release: "DR1"
licence: "CC-BY-SA-4.0"
citation: "SpaceCatalog. NGC 7577 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ngc-7577"
---

# NGC 7577

NGC 7577 is a [galaxy](https://spacecatalog.org/galaxies) in the constellation [Pisces](https://spacecatalog.org/constellation/pisces). Other catalogues list it as 2MASX J23171708+0721556, LEDA 70947 and PGC 70947. It was discovered in 1885.

## At a glance

- **WHAT IT IS:** Galaxy
- **HOW BIG ON THE SKY:** 23″ — Small enough that the full Moon would cover it several times over.
- **WHERE TO LOOK:** [Pisces](https://spacecatalog.org/constellation/pisces) — The patch of sky it sits in, as seen from Earth.

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | Galaxy |
| CONSTELLATION | Pisces |
| RIGHT ASCENSION (J2000) | 23h 17m 17.1s |
| DECLINATION (J2000) | +07° 21′ 55.5″ |
| DISCOVERED | 1885 |

## 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 (J) | 12.87 |
| Apparent magnitude (H band) | 12.46 |
| Apparent magnitude (K) | 12.08 |

### 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 | 0.38′ |
| Minor axis | 0.27′ |
| Position angle | 65° |

### WHEN IT WAS FOUND

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

| Field | Value |
| --- | --- |
| Discovered by | Guillaume Bigourdan |

### 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 | Q1168140 |

## Also known as

- 2MASX: 2MASX J23171708+0721556
- LEDA: LEDA 70947
- NGC: NGC 7577
- PGC: PGC 70947

## 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 7577 \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ngc-7577

```bibtex
@misc{spacecatalog_ngc-7577,
  author       = {{SpaceCatalog}},
  title        = {{NGC 7577}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/ngc-7577},
  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-7577