---
title: "35 Cyg"
url: "https://spacecatalog.org/object/hd-193370"
release: "DR1"
licence: "CC-BY-SA-4.0"
citation: "SpaceCatalog. 35 Cyg [catalogue entry]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hd-193370"
---

# 35 Cyg

35 Cyg is an F6Ib yellow-white supergiant in the constellation [Cygnus](https://spacecatalog.org/constellation/cygnus), 3167 ly from Earth, shining at apparent magnitude 5.14 (V). Other catalogues list it as HD 193370, HIP 100122 and HR 7770.

## At a glance

- **WHAT IT IS:** Yellow-white supergiant
- **HOW FAR:** 3167 ly — The light arriving now left it that long ago.
- **HOW BRIGHT (V):** 5.14 — Bright enough for the naked eye, under a sky dark enough.
- **WHERE TO LOOK:** [Cygnus](https://spacecatalog.org/constellation/cygnus) — The patch of sky it sits in, as seen from Earth.

## Properties

| Quantity | Value |
| --- | --- |
| CLASS | F6Ib yellow-white supergiant |
| DISTANCE FROM EARTH | 3167 ly — by parallax |
| APPARENT MAGNITUDE (V) | 5.14 |
| ABSOLUTE MAGNITUDE (V) | −4.80 |
| CONSTELLATION | Cygnus |
| RIGHT ASCENSION (J2000) | 20h 18m 39.1s |
| DECLINATION (J2000) | +34° 58′ 58.0″ |

## 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 | F6Ib |
| Surface temperature | 6356 K |
| Luminosity (visual) | 7217.72 L☉ |
| Surface gravity (log g) | 1.79 |
| Metallicity (\[Fe/H\]) | −0.04 ±0.11 |

### 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) | 0.66 |

### 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) | 0.1 mas/yr |
| Proper motion (Dec) | −3.81 mas/yr |
| Radial velocity | −14 km/s |

### WHERE THESE FIGURES CAME FROM

Which catalogue, paper or model each of the fields above was read from, where the source named one.

| Field | Value |
| --- | --- |
| Spectral type from | SIMBAD (2009ApJS..180..117A, quality C) |
| Stellar parameters from | Spectroscopic determinations compiled from the literature (PASTEL, Soubiran+ 2016) |
| Metallicity from | Median of 4 spectroscopic determinations in 4 papers, compiled from the literature (PASTEL, Soubiran+ 2016); the error bar is the scatter between them |

## Also known as

- Bayer/Flamsteed: 35 Cyg
- HD: HD 193370
- HIP: HIP 100122
- HR: HR 7770

## 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. 35 Cyg \[catalogue entry\]. Data release DR1 (2026-08-21). https://spacecatalog.org/object/hd-193370

```bibtex
@misc{spacecatalog_hd-193370,
  author       = {{SpaceCatalog}},
  title        = {{35 Cyg}},
  howpublished = {SpaceCatalog, data release DR1 (2026-08-21)},
  year         = {2026},
  url          = {https://spacecatalog.org/object/hd-193370},
  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/hd-193370