---
title: "HIP 89743"
url: "https://spacecatalog.org/object/hip-89743"
release: "DR1"
licence: "CC-BY-SA-4.0"
citation: "SpaceCatalog. HIP 89743 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hip-89743"
---

# HIP 89743

HIP 89743 is an O9.7V blue main-sequence [star](https://spacecatalog.org/stars) in the constellation [Serpens](https://spacecatalog.org/constellation/serpens), 1370 ly from Earth, shining at apparent magnitude 9.34 (V).

## At a glance

- **WHAT IT IS:** Blue main-sequence star
- **HOW FAR:** 1370 ly — The light arriving now left it that long ago.
- **HOW BRIGHT (V):** 9.34 — Binoculars reach it; the naked eye does not.
- **WHERE TO LOOK:** [Serpens](https://spacecatalog.org/constellation/serpens) — The patch of sky it sits in, as seen from Earth.

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | O9.7V blue main-sequence star |
| DISTANCE FROM EARTH | 1370 ly — by parallax |
| APPARENT MAGNITUDE (V) | 9.34 |
| ABSOLUTE MAGNITUDE (V) | 1.22 |
| CONSTELLATION | Serpens |
| RIGHT ASCENSION (J2000) | 18h 18m 52.7s |
| DECLINATION (J2000) | −13° 49′ 42.6″ |

## 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 |
| --- | --- |
| Spectral type | O9.7V |
| Surface temperature | 31 715 K |
| Luminosity | 28.2358 L☉ |
| Surface gravity (log g) | 4.17 |
| Metallicity (\[Fe/H\]) | 0.42 |

### 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 |
| --- | --- |
| Colour index (B−V) | 0.267 |

### 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 |
| --- | --- |
| Proper motion (RA) | 1.95 mas/yr |
| Proper motion (Dec) | −0.86 mas/yr |
| Radial velocity | 0 km/s |

### WHERE THESE FIGURES CAME FROM

Which catalogue, paper or model each of the fields above was read from, where the source named one.

| Field | Value |
| --- | --- |
| Spectral type from | SIMBAD (2022A&A...657A.131M, quality C) |
| Stellar parameters from | Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016) |
| Metallicity from | One spectroscopic determination, compiled from the literature (PASTEL, Soubiran+ 2016) |

## Also known as

- HIP: HIP 89743

## Source

[HYG Database v4.1](https://github.com/astronexus/HYG-Database) — CC-BY-SA-4.0

The producer asks: HYG Database v4.1, Astronexus (github.com/astronexus/HYG-Database). Fields derived from it stay under CC BY-SA 4.0.

How this was made: https://spacecatalog.org/methods#source-hyg

## Cite this page

SpaceCatalog. HIP 89743 \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hip-89743

```bibtex
@misc{spacecatalog_hip-89743,
  author       = {{SpaceCatalog}},
  title        = {{HIP 89743}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/hip-89743},
  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from HYG Database v4.1.}
}
```

HYG Database v4.1 — CC-BY-SA-4.0

Acknowledgement the producer asks for: HYG Database v4.1, Astronexus (github.com/astronexus/HYG-Database). 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/hip-89743