---
title: "NGC 733"
url: "https://spacecatalog.org/object/ngc-733"
release: "DR1"
licence: "CC-BY-SA-4.0"
citation: "SpaceCatalog. NGC 733 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ngc-733"
---

# NGC 733

NGC 733 is a [star](https://spacecatalog.org/stars) in the constellation [Triangulum](https://spacecatalog.org/constellation/triangulum), shining at apparent magnitude 15.80 (B). Other catalogues list it as 2MASS J01563394+3303181. It was discovered in 1850.

## At a glance

- **WHAT IT IS:** Star
- **HOW BRIGHT (B):** 15.80 — Faint: it takes a large telescope.
- **WHERE TO LOOK:** [Triangulum](https://spacecatalog.org/constellation/triangulum) — The patch of sky it sits in, as seen from Earth.

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | Star |
| APPARENT MAGNITUDE (B) | 15.80 |
| CONSTELLATION | Triangulum |
| RIGHT ASCENSION (J2000) | 01h 56m 33.9s |
| DECLINATION (J2000) | +33° 03′ 19.1″ |
| DISCOVERED | 1850 |

## 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) | 15.80 |
| Apparent magnitude (J) | 14.42 |
| Apparent magnitude (H band) | 14.02 |
| Apparent magnitude (K) | 13.96 |

### WHEN IT WAS FOUND

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

| Field | Value |
| --- | --- |
| Discovered by | William Parsons, 3rd Earl of Rosse |

### 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 | Q1038637 |

## Also known as

- 2MASS: 2MASS J01563394+3303181
- NGC: NGC 733

## 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 733 \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ngc-733

```bibtex
@misc{spacecatalog_ngc-733,
  author       = {{SpaceCatalog}},
  title        = {{NGC 733}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/ngc-733},
  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-733