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Anomaly variable star 90 EP

HR 4195

RA 161.2668° · Dec 67.4114° · star

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Score breakdown

· 10 badges
90 pts · Anomaly
Anomaly 120 pts → Mythic
  • Carbon star (sooty red) +24
  • Fades out of naked-eye view +16
  • Bright giant +12
  • Naked-eye visible +8
  • Deep red star +8
  • Distant (over 1,000 light-years) +6
  • Variable star +5
  • Never sets (northern circumpolar) +4
  • Gently variable +4
  • A named variable star +3
Total score 90

30 more points to reach Mythic.

Badges

  • Variable star · +5
  • Distant (over 1,000 light-years) · +6
  • Naked-eye visible · +8
  • Never sets (northern circumpolar) · +4
  • Carbon star (sooty red) · +24
  • Bright giant · +12
  • Deep red star · +8
  • Gently variable · +4
  • Fades out of naked-eye view · +16
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads C5II — 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 a bright giant, well on its way to the largest stars there are.
  • 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.

Sense of scale

  • In perspective. Far away by human standards, yet still a local address inside the Milky Way's spiral arms.

Find it in the sky

  • How to spot it. At magnitude 6 you can see it with your own eyes from a dark site, over in Ursa Major.
  • Never sets. So far north that from Britain, Canada or northern Europe it never dips below the horizon — it is up every clear night of the year.
  • Best time of year. It stands highest in the middle of the night around March — that's when to go looking.

Could we get there?

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

Properties

absmag
-1.95
bv
2.382
constellation
UMa
dist ly
1240.1368
luminosity
524.8075
mag
5.95
name
HR 4195
spect
C5II
var amplitude
0.23
var designation
VY
var max
5.856
var min
6.086

About HR 4195

HR 4195 is an anomaly variable star. It lies about 1,240.1 light-years from Earth, sits in the constellation UMa, shines at apparent magnitude 5.95 and has spectral type C5II.

Its spectrum reads C5II — a carbon star, wrapped in so much soot that its light is filtered to a deep ruby red.

How to see it

Look for HR 4195 in the constellation UMa. At apparent magnitude 5.95, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, HR 4195 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 HR 4195 is an anomaly variable star

HR 4195 scores 90 points on Spacedle's rarity scale, which places it in the anomaly tier. Another 30 points would lift it into a rarer tier.

That score comes from 10 science badges — Variable star, Distant (over 1,000 light-years), Naked-eye visible, Never sets (northern circumpolar), Carbon star (sooty red), Bright giant, Deep red star and Gently variable — 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.