---
title: "PSR J1651-5222"
url: "https://spacecatalog.org/object/psr-j1651m5222"
release: "DR1"
licence: "No licence stated; the database is ATNF/CSIRO property under the CSIRO Legal Notice and Disclaimer"
citation: "SpaceCatalog. PSR J1651-5222 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/psr-j1651m5222"
---

# PSR J1651-5222

PSR J1651-5222 is a pulsar in the constellation [Ara](https://spacecatalog.org/constellation/ara), 20 287 ly from Earth. Other catalogues list it as B1647-52 and PSR B1647-52.

## At a glance

- **WHAT IT IS:** Pulsar
- **HOW FAR:** 20 287 ly — The light arriving now left it that long ago.
- **WHERE TO LOOK:** [Ara](https://spacecatalog.org/constellation/ara) — The patch of sky it sits in, as seen from Earth.

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | Pulsar |
| DISTANCE FROM EARTH | 20 287 ly — by dispersion measure through the YMW16 electron-density model |
| CONSTELLATION | Ara |
| RIGHT ASCENSION (J2000) | 16h 51m 43.0s |
| DECLINATION (J2000) | −52° 22′ 58.4″ |

## 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 | 1.09×10¹² G |
| Spin period | 0.635058 s |
| Spin-down rate | 1.81×10⁻¹⁵ s/s |
| Characteristic age | 5 556 956 yr |
| Spin-down luminosity | 2.79×10³² erg/s |

### 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 |
| --- | --- |
| Radio flux at 1400 MHz | 4.1 mJy |

### 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 | 35 mas |
| Dispersion measure | 178.25 pc/cm³ |

## Also known as

- ATNF: B1647-52
- ATNF: J1651-5222
- ATNF: PSR B1647-52
- ATNF: PSR J1651-5222

## 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 J1651-5222 \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/psr-j1651m5222

```bibtex
@misc{spacecatalog_psr-j1651m5222,
  author       = {{SpaceCatalog}},
  title        = {{PSR J1651-5222}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/psr-j1651m5222},
  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-j1651m5222