---
title: "C/2023 A3 (Tsuchinshan-ATLAS)"
url: "https://spacecatalog.org/object/c-2023-a3-tsuchinshan-atlas"
release: "DR1"
licence: "No licence stated; citation requested"
citation: "SpaceCatalog. C/2023 A3 (Tsuchinshan-ATLAS) [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/c-2023-a3-tsuchinshan-atlas"
---

# C/2023 A3 (Tsuchinshan-ATLAS)

C/2023 A3 (Tsuchinshan-ATLAS) is a hyperbolic [comet](https://spacecatalog.org/comets). Its orbit does not close: it passes within 0.39143 AU of the [Sun](https://spacecatalog.org/object/sun) once and never returns.

## At a glance

- **WHAT IT IS:** Hyperbolic comet

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | Hyperbolic comet |
| ORBITS | Sun |
| PERIHELION | 0.39143 AU |
| ORBIT | hyperbolic — unbound |

## Catalogue data

### THE ORBIT

The shape of the path, where the object sits on it, and the instant those figures were true of. An orbit is a fit to observations and drifts away from the real one either side of its epoch.

| Field | Value |
| --- | --- |
| Eccentricity | 1.0001 |
| Hyperbolic excess velocity | 0.46 km/s |
| Inclination | 139.11° |
| Longitude of ascending node | 21.56° |
| Argument of perihelion | 308.49° |
| Mean anomaly | 0° |
| Element epoch | 2460448.5000 JD |
| Perihelion passage | 2460581.2408 JD |
| Minimum distance from Earth's orbit | 0.275055 AU |
| Orbit class | HYP |

### WHEN IT WAS FOUND

Who first saw it, from where, and by what method.

| Field | Value |
| --- | --- |
| First observed | 2022-04-09 |

## Also known as

- Comet: 2023 A3
- Comet: C/2023 A3 (Tsuchinshan-ATLAS)
- Common name: Tsuchinshan-ATLAS

## Source

[JPL Small-Body Database](https://ssd.jpl.nasa.gov/tools/sbdb_query.html) — No licence stated; citation requested

The producer asks: Solar System Dynamics. (Downloaded 2026, October 1). Small-Body Database Query. https://ssd.jpl.nasa.gov

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

## Cite this page

SpaceCatalog. C/2023 A3 (Tsuchinshan-ATLAS) \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/c-2023-a3-tsuchinshan-atlas

```bibtex
@misc{spacecatalog_c-2023-a3-tsuchinshan-atlas,
  author       = {{SpaceCatalog}},
  title        = {{C/2023 A3 (Tsuchinshan-ATLAS)}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/c-2023-a3-tsuchinshan-atlas},
  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from JPL Small-Body Database.}
}
```

JPL Small-Body Database — No licence stated; citation requested

Acknowledgement the producer asks for: Solar System Dynamics. (Downloaded 2026, October 1). Small-Body Database Query. https://ssd.jpl.nasa.gov

The page itself, with its pictures, the sky map and the observing tools: https://spacecatalog.org/object/c-2023-a3-tsuchinshan-atlas