---
title: "PSR J1805+0306"
url: "https://spacecatalog.org/object/psr-j1805p0306"
release: "DR1"
licence: "No licence stated; the database is ATNF/CSIRO property under the CSIRO Legal Notice and Disclaimer"
citation: "SpaceCatalog. PSR J1805+0306 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/psr-j1805p0306"
---

# PSR J1805+0306

PSR J1805+0306 is a pulsar in the constellation [Ophiuchus](https://spacecatalog.org/constellation/ophiuchus), 17 133 ly from Earth. Other catalogues list it as B1802+03 and PSR B1802+03.

## At a glance

- **WHAT IT IS:** Pulsar
- **HOW FAR:** 17 133 ly — The light arriving now left it that long ago.
- **WHERE TO LOOK:** [Ophiuchus](https://spacecatalog.org/constellation/ophiuchus) — The patch of sky it sits in, as seen from Earth.

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | Pulsar |
| DISTANCE FROM EARTH | 17 133 ly — by dispersion measure through the YMW16 electron-density model |
| CONSTELLATION | Ophiuchus |
| RIGHT ASCENSION (J2000) | 18h 05m 10.2s |
| DECLINATION (J2000) | +03° 06′ 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 |
| --- | --- |
| Surface magnetic field | 4.73×10¹¹ G |
| Spin period | 0.218712 s |
| Spin-down rate | 9.99×10⁻¹⁶ s/s |
| Characteristic age | 3 467 165 yr |
| Spin-down luminosity | 3.77×10³³ erg/s |

### 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 |
| --- | --- |
| Position known to | 0.11″ |
| Dispersion measure | 80.86 pc/cm³ |

## Also known as

- ATNF: B1802+03
- ATNF: J1805+0306
- ATNF: PSR B1802+03
- ATNF: PSR J1805+0306

## Source

[ATNF Pulsar Catalogue (Manchester+ 2005)](https://www.atnf.csiro.au/research/pulsar/psrcat) — No licence stated; the database is ATNF/CSIRO property under the CSIRO Legal Notice and Disclaimer

The producer asks: Manchester, R. N., Hobbs, G. B., Teoh, A. & Hobbs, M. 2005, AJ 129, 1993 (2005AJ....129.1993M); https://www.atnf.csiro.au/research/pulsar/psrcat

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

## Cite this page

SpaceCatalog. PSR J1805+0306 \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/psr-j1805p0306

```bibtex
@misc{spacecatalog_psr-j1805p0306,
  author       = {{SpaceCatalog}},
  title        = {{PSR J1805+0306}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/psr-j1805p0306},
  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from ATNF Pulsar Catalogue (Manchester+ 2005).}
}
```

ATNF Pulsar Catalogue (Manchester+ 2005) — No licence stated; the database is ATNF/CSIRO property under the CSIRO Legal Notice and Disclaimer

Acknowledgement the producer asks for: Manchester, R. N., Hobbs, G. B., Teoh, A. & Hobbs, M. 2005, AJ 129, 1993 (2005AJ....129.1993M); https://www.atnf.csiro.au/research/pulsar/psrcat

The page itself, with its pictures, the sky map and the observing tools: https://spacecatalog.org/object/psr-j1805p0306