---
title: "NGC3991 NED02"
url: "https://spacecatalog.org/object/ngc3991-ned02"
release: "DR1"
licence: "CC-BY-SA-4.0"
citation: "SpaceCatalog. NGC3991 NED02 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ngc3991-ned02"
---

# NGC3991 NED02

NGC3991 NED02 is a spiral [galaxy](https://spacecatalog.org/galaxies) Sab in the constellation [Ursa Major](https://spacecatalog.org/constellation/ursa-major), 166.5 Mly from Earth, shining at apparent magnitude 14.93 (B). Other catalogues list it as MCG +06-26-060 NED02, PGC 200277 and SDSS J115731.73+322030.1, among 7 designations in total.

## At a glance

- **WHAT IT IS:** Spiral galaxy
- **HOW FAR:** 166.5 Mly — A luminosity distance, from its redshift — how faint it looks. The light itself left 151 million years ago.
- **HOW BIG ON THE SKY:** 50″ — Small enough that the full Moon would cover it several times over.
- **HOW BRIGHT (B):** 14.93 — Faint: it takes a large telescope.
- **WHERE TO LOOK:** [Ursa Major](https://spacecatalog.org/constellation/ursa-major) — The patch of sky it sits in, as seen from Earth.

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | Spiral galaxy Sab |
| DISTANCE FROM EARTH | 166.5 Mly ±16 — by redshift (CMB frame), flat ΛCDM with H0 = 70 km/s/Mpc |
| APPARENT MAGNITUDE (B) | 14.93 |
| CONSTELLATION | Ursa Major |
| RIGHT ASCENSION (J2000) | 11h 57m 31.7s |
| DECLINATION (J2000) | +32° 20′ 30.2″ |

## 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 | Sab |

### 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) | 14.93 |
| Surface brightness | 22.98 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 | 3241 km/s |
| Redshift (z) | 0.010871 |
| Redshift (z, CMB frame) | 0.0118154 |
| Major axis | 0.83′ |
| Minor axis | 0.5′ |
| Position angle | 15° |

### 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 |

## Also known as

- MCG: MCG +06-26-060 NED02
- NGC: NGC 3991N
- OpenNGC: NGC3991 NED02
- PGC: PGC 200277
- SDSS: SDSS J115731.73+322030.1
- SDSS: SDSS J115731.73+322030.2
- UGC: UGC 06933 NED02

## 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. NGC3991 NED02 \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ngc3991-ned02

```bibtex
@misc{spacecatalog_ngc3991-ned02,
  author       = {{SpaceCatalog}},
  title        = {{NGC3991 NED02}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/ngc3991-ned02},
  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/ngc3991-ned02