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Common variable star 20 EP

HIP 95777

RA 292.1982° · Dec 46.0439° · star

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Score breakdown

· 4 badges
20 pts · Common
Common 22 pts → Uncommon
  • Deep red star +8
  • Variable star +5
  • Gently variable +4
  • A named variable star +3
Total score 20

2 more points to reach Uncommon.

Badges

  • Variable star · +5
  • Deep red star · +8
  • Gently variable · +4
  • A named variable star · +3

Trivia

Hard to believe

  • True brightness. It pours out about 4.3 million times as much light as the Sun. It only looks ordinary because it is so far away.

What it actually is

  • Spectral class. Its spectrum reads N0v — a carbon star, wrapped in so much soot that its light is filtered to a deep ruby red.
  • Where it is in life. It is on the main sequence, quietly fusing hydrogen in its core exactly as the Sun does.
  • It changes. This star does not hold still: its brightness rises and falls on a rhythm of hours, days or years, either pulsing in size or being eclipsed by a companion.

Find it in the sky

  • How to spot it. At magnitude 8.2 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Cygnus.
  • Northern sky. It rides the northern half of the sky — an easier target the further north you are.
  • Best time of year. It stands highest in the middle of the night around July — that's when to go looking.

Its true colour

  • Its true colour. Measured through blue and visual filters it comes out deep orange-red (B−V 1.6) — one of the coolest surfaces a star can have while still fusing.

Properties

absmag
-11.75
bv
1.6
constellation
Cyg
luminosity
4365158.3224
mag
8.25
name
HIP 95777
spect
N0v
var amplitude
0.32
var designation
AW
var max
8.161
var min
8.481

Nearby objects

About HIP 95777

HIP 95777 is a common variable star. It sits in the constellation Cyg, shines at apparent magnitude 8.25 and has spectral type N0v.

Its spectrum reads N0v — a carbon star, wrapped in so much soot that its light is filtered to a deep ruby red.

How to see it

Look for HIP 95777 in the constellation Cyg. At apparent magnitude 8.25, it is an easy target for binoculars.

Like any astronomical target, HIP 95777 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 HIP 95777 is a common variable star

HIP 95777 scores 20 points on Spacedle's rarity scale, which places it in the common tier. Another 2 points would lift it into a rarer tier.

That score comes from 4 science badges — Variable star, Deep red star, Gently variable and A named variable star — 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.