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Common variable star 15 EP

25 Cyg

RA 299.9800° · Dec 37.0429° · star

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Score breakdown

· 2 badges
15 pts · Common
Common 24 pts → Uncommon
  • Distant (>1000 ly) +10
  • Variable star +5
Total score 15

9 more points to reach Uncommon.

Badges

  • Variable star · +5
  • Distant (>1000 ly) · +10

Trivia

Could we get there?

  • Verdict. Impossible with our current technology — and the next millennium of it.

Getting there

  • Aboard Voyager 1. ≈ 23.2 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 2.1 million years even at the Parker Solar Probe's 192 km/s.
  • At 10% light speed. ≈ 13.2 thousand years in a starship at a tenth of light speed.
  • Distance. 1320 light-years from Earth.

Look-back time

  • Look-back time. The light you'd see left around the year 706.

Saying hello

  • Say hello. A radio message and its reply would take 2641 years round-trip.

Properties

absmag
-2.887
bv
-0.133
constellation
Cyg
dist ly
1320.4696
mag
5.15
name
25 Cyg
spect
B3IV

About 25 Cyg

25 Cyg is a common variable star. It lies about 1,320.5 light-years from Earth, sits in the constellation Cyg, shines at apparent magnitude 5.15 and has spectral type B3IV.

25 Cyg is a common variable star worth 15 points across 2 science badges. Explore its facts, badges and place on the sky map, then add it to your dex on Spacedle.

How to see it

Look for 25 Cyg in the constellation Cyg. At apparent magnitude 5.15, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, 25 Cyg is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. The visibility panel above works out tonight's viewing window for your saved location.

Why 25 Cyg is a common variable star

25 Cyg scores 15 points on Spacedle's rarity scale, which places it in the common tier. Another 9 points would lift it into a rarer tier.

That score comes from 2 science badges — Variable star and Distant (>1000 ly) — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.

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Sky imagery and survey data courtesy of Aladin Lite & CDS, Strasbourg. Object data from the NASA Exoplanet Archive, JPL Small-Body Database, and the ATNF Pulsar Catalogue.