---
title: "SY CVn"
url: "https://spacecatalog.org/object/hip-64267"
release: "DR1"
licence: "CC-BY-SA-4.0"
citation: "SpaceCatalog. SY CVn [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hip-64267"
---

# SY CVn

SY CVn is an M8 red [star](https://spacecatalog.org/stars) in the constellation [Canes Venatici](https://spacecatalog.org/constellation/canes-venatici), 1977 ly from Earth, shining at apparent magnitude 9.91 (V). Other catalogues list it as HIP 64267.

## At a glance

- **WHAT IT IS:** Red star
- **HOW FAR:** 1977 ly — The light arriving now left it that long ago.
- **HOW BRIGHT (V):** 9.91 — A small telescope reaches it.
- **WHERE TO LOOK:** [Canes Venatici](https://spacecatalog.org/constellation/canes-venatici) — The patch of sky it sits in, as seen from Earth.

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | M8 red star |
| DISTANCE FROM EARTH | 1977 ly — by parallax |
| APPARENT MAGNITUDE (V) | 9.91 |
| ABSOLUTE MAGNITUDE (V) | 1.00 |
| CONSTELLATION | Canes Venatici |
| RIGHT ASCENSION (J2000) | 13h 10m 20.3s |
| DECLINATION (J2000) | +47° 02′ 28.1″ |

## 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 |
| --- | --- |
| Spectral type | M8 |
| Luminosity | 34.7696 L☉ |
| Variability | Slow irregular giant (late spectral type) |
| Variability type (GCVS) | LB |

### 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 |
| --- | --- |
| Colour index (B−V) | 1.078 |
| Variable magnitude, brightest | 9.33 |
| Variable magnitude, faintest | 10.28 |

### 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 |
| --- | --- |
| Proper motion (RA) | −41 mas/yr |
| Proper motion (Dec) | 15.24 mas/yr |
| Radial velocity | 0 km/s |

### OTHER NAMES AND NUMBERS

The identifiers other catalogues file this object under, for anyone joining this data to theirs.

| Field | Value |
| --- | --- |
| Variable-star designation | SY CVn |

## Also known as

- HIP: HIP 64267
- Variable star: SY CVn

## Source

[HYG Database v4.1](https://github.com/astronexus/HYG-Database) — CC-BY-SA-4.0

The producer asks: HYG Database v4.1, Astronexus (github.com/astronexus/HYG-Database). Fields derived from it stay under CC BY-SA 4.0.

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

## Cite this page

SpaceCatalog. SY CVn \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hip-64267

```bibtex
@misc{spacecatalog_hip-64267,
  author       = {{SpaceCatalog}},
  title        = {{SY CVn}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/hip-64267},
  note         = {Catalogue entry, data release DR1 (2026-08-21). Values from HYG Database v4.1.}
}
```

HYG Database v4.1 — CC-BY-SA-4.0

Acknowledgement the producer asks for: HYG Database v4.1, Astronexus (github.com/astronexus/HYG-Database). Fields derived from it stay under CC BY-SA 4.0.

The page itself, with its pictures, the sky map and the observing tools: https://spacecatalog.org/object/hip-64267