---
title: "HS 1946+7658"
url: "https://spacecatalog.org/object/hs-1946-7658"
release: "DR1"
licence: "CC-BY-4.0"
citation: "SpaceCatalog. HS 1946+7658 [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hs-1946-7658"
---

# HS 1946+7658

HS 1946+7658 is a quasar in the constellation [Draco](https://spacecatalog.org/constellation/draco), 82.36 Gly from Earth.

One of the intrinsically brightest quasars in the sky, and a standard sightline for the intergalactic medium. The forest of absorption lines across its spectrum is a record of every cloud of hydrogen its light has passed through on the way here.

## At a glance

- **WHAT IT IS:** Quasar
- **HOW FAR:** 82.36 Gly — A luminosity distance, from its redshift — how faint it looks. The light itself left 11.2 billion years ago.
- **WHERE TO LOOK:** [Draco](https://spacecatalog.org/constellation/draco) — The patch of sky it sits in, as seen from Earth.

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | Quasar |
| DISTANCE FROM EARTH | 82.36 Gly — by luminosity distance from a published redshift, flat ΛCDM with H0 = 70 km/s/Mpc |
| CONSTELLATION | Draco |
| RIGHT ASCENSION (J2000) | 19h 44m 54.9s |
| DECLINATION (J2000) | +77° 05′ 52.7″ |

## 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 |

### 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) | 3.02 |

## Also known as

- Common name: HS 1946+7658

## 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. HS 1946+7658 \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hs-1946-7658

```bibtex
@misc{spacecatalog_hs-1946-7658,
  author       = {{SpaceCatalog}},
  title        = {{HS 1946+7658}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/hs-1946-7658},
  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/hs-1946-7658