---
title: "NGC 5866B"
url: "https://spacecatalog.org/object/ngc-5866b"
release: "DR1"
licence: "CC-BY-SA-4.0"
citation: "SpaceCatalog. NGC 5866B [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ngc-5866b"
---

# NGC 5866B

NGC 5866B is an intermediate spiral [galaxy](https://spacecatalog.org/galaxies) SABd in the constellation [Draco](https://spacecatalog.org/constellation/draco), 42.42 Mly from Earth, shining at apparent magnitude 15.43 (B). Other catalogues list it as LEDA 54267, MCG +09-25-034 and PGC 54267, among 9 designations in total.

## At a glance

- **WHAT IT IS:** Intermediate spiral galaxy
- **HOW FAR:** 42.42 Mly — A luminosity distance, from its redshift — how faint it looks. The light itself left 39.2 million years ago.
- **HOW BIG ON THE SKY:** 2.3′ — Small enough that the full Moon would cover it several times over.
- **HOW BRIGHT (B):** 15.43 — Faint: it takes a large telescope.
- **WHERE TO LOOK:** [Draco](https://spacecatalog.org/constellation/draco) — The patch of sky it sits in, as seen from Earth.

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | Intermediate spiral galaxy SABd |
| DISTANCE FROM EARTH | 42.42 Mly ±14 — by redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc |
| APPARENT MAGNITUDE (B) | 15.43 |
| CONSTELLATION | Draco |
| RIGHT ASCENSION (J2000) | 15h 12m 07.2s |
| DECLINATION (J2000) | +55° 47′ 06.3″ |

## 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 | SABd |

### 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) | 15.43 |
| Surface brightness | 25.56 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 | 841 km/s |
| Redshift (z) | 0.002809 |
| Redshift (z, CMB frame) | 0.00302964 |
| Major axis | 2.33′ |
| Minor axis | 1.66′ |
| Position angle | 16° |

### 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 | Q1123662 |
| Wikipedia article | NGC 5866B |

## Also known as

- LEDA: LEDA 54267
- MCG: MCG +09-25-034
- NGC: NGC 5866B
- PGC: PGC 54267
- SDSS: SDSS J151207.19+554706.3
- SDSS: SDSS J151207.22+554706.2
- SDSS: SDSS J151207.23+554706.2
- SDSS: SDSS J151207.23+554706.3
- UGC: UGC 9769

## 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 5866B \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ngc-5866b

```bibtex
@misc{spacecatalog_ngc-5866b,
  author       = {{SpaceCatalog}},
  title        = {{NGC 5866B}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/ngc-5866b},
  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-5866b