---
title: "SDSS J0100+2802"
url: "https://spacecatalog.org/object/sdss-j0100-2802"
release: "DR1"
licence: "CC-BY-4.0"
citation: "SpaceCatalog. SDSS J0100+2802 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/sdss-j0100-2802"
---

# SDSS J0100+2802

SDSS J0100+2802 is a quasar in the constellation [Pisces](https://spacecatalog.org/constellation/pisces), 196.9 Gly from Earth. Its mass is 1.2×10¹⁰ M☉. It was discovered in 2015.

The most luminous quasar known in the first billion years, powered by a [black hole](https://spacecatalog.org/black-holes) of twelve billion solar masses. Nothing else that early is anywhere near that heavy, and it is the single hardest object to explain in any account of how the first black holes grew.

## At a glance

- **WHAT IT IS:** Quasar
- **HOW FAR:** 196.9 Gly — A luminosity distance, from its redshift — how faint it looks. The light itself left 12.4 billion years ago.
- **WHERE TO LOOK:** [Pisces](https://spacecatalog.org/constellation/pisces) — The patch of sky it sits in, as seen from Earth.

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | Quasar |
| MASS | 1.2×10¹⁰ M☉ |
| DISTANCE FROM EARTH | 196.9 Gly — by luminosity distance from a published redshift, flat ΛCDM with H0 = 70 km/s/Mpc |
| CONSTELLATION | Pisces |
| RIGHT ASCENSION (J2000) | 01h 00m 13.0s |
| DECLINATION (J2000) | +28° 02′ 25.8″ |
| DISCOVERED | 2015 |

## 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 |
| --- | --- |
| Accretion state | quasar — a thin disc near its Eddington limit |
| Mass | 1.2×10¹⁰ M☉ |

### 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 |
| --- | --- |
| Redshift (z) | 6.3269 |

## Also known as

- Common name: SDSS J0100+2802

## Source

[SpaceCatalog curated data](https://spacecatalog.org/releases) — CC-BY-4.0

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

## Cite this page

SpaceCatalog. SDSS J0100+2802 \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/sdss-j0100-2802

```bibtex
@misc{spacecatalog_sdss-j0100-2802,
  author       = {{SpaceCatalog}},
  title        = {{SDSS J0100+2802}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/sdss-j0100-2802},
  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from SpaceCatalog curated data.}
}
```

SpaceCatalog curated data — CC-BY-4.0

The page itself, with its pictures, the sky map and the observing tools: https://spacecatalog.org/object/sdss-j0100-2802