---
title: "IC 4681"
url: "https://spacecatalog.org/object/ic-4681"
release: "DR1"
licence: "CC-BY-SA-4.0"
citation: "SpaceCatalog. IC 4681 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ic-4681"
---

# IC 4681

IC 4681 is a [star](https://spacecatalog.org/stars) in the constellation [Sagittarius](https://spacecatalog.org/constellation/sagittarius), shining at apparent magnitude 9.10 (V). Other catalogues list it as 2MASS J18081997-2325551, Ced 154a and HD 165705, among 10 designations in total.

## At a glance

- **WHAT IT IS:** Star
- **HOW BRIGHT (V):** 9.10 — Binoculars reach it; the naked eye does not.
- **WHERE TO LOOK:** [Sagittarius](https://spacecatalog.org/constellation/sagittarius) — The patch of sky it sits in, as seen from Earth.

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | Star |
| APPARENT MAGNITUDE (V) | 9.10 |
| CONSTELLATION | Sagittarius |
| RIGHT ASCENSION (J2000) | 18h 08m 20.0s |
| DECLINATION (J2000) | −23° 25′ 55.3″ |

## 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) | 9.26 |
| Apparent magnitude (V) | 9.10 |
| Apparent magnitude (J) | 8.99 |
| Apparent magnitude (H band) | 8.93 |
| Apparent magnitude (K) | 8.92 |

### 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 | Q3681735 |

## Also known as

- 2MASS: 2MASS J18081997-2325551
- Cederblad: Ced 154a
- HD: HD 165705
- IC: IC 4681
- IDS: IDS 18022-2327 AB
- Lynds: LBN 007.28-01.59
- Lynds: LBN 31
- SAO: SAO 186340
- TYC: TYC 6842-1272-1
- WDS: WDS J18083-2326AB

## 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. IC 4681 \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/ic-4681

```bibtex
@misc{spacecatalog_ic-4681,
  author       = {{SpaceCatalog}},
  title        = {{IC 4681}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/ic-4681},
  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/ic-4681