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Uncommon variable star 25 EP

HIP 61997

RA 190.5823° · Dec -62.9938° · star

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Score breakdown

· 5 badges
25 pts · Uncommon
Uncommon 34 pts → Rare
  • Under the Southern Cross +8
  • Variable star +5
  • White A-type star +5
  • Gently variable +4
  • A named variable star +3
Total score 25

9 more points to reach Rare.

Badges

  • Variable star · +5
  • Under the Southern Cross · +8
  • White A-type star · +5
  • Gently variable · +4
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads A — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.
  • 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 9.7 you'll want a small backyard telescope, over in Crux.
  • Southern sky only. So far south it never rises for most of the northern hemisphere. To see it you'd have to travel to Chile, South Africa or Australia.
  • Best time of year. It stands highest in the middle of the night around April — that's when to go looking.

Could we get there?

  • Verdict. Hopelessly far for any craft humanity can build today.

Getting there

  • Aboard Voyager 1. ≈ 16.8 million years at Voyager 1's speed (17 km/s).

Properties

absmag
2.39
bv
0.196
constellation
Cru
dist ly
953.6726
luminosity
9.6383
mag
9.72
name
HIP 61997
spect
A
var amplitude
0.34
var designation
DP
var max
9.587
var min
9.927

About HIP 61997

HIP 61997 is an uncommon variable star. It lies about 953.7 light-years from Earth, sits in the constellation Cru, shines at apparent magnitude 9.72 and has spectral type A.

Its spectrum reads A — an A-type star: white-hot, typically about twice the Sun's mass, and the class most of the sky's famous bright stars belong to.

How to see it

Look for HIP 61997 in the constellation Cru. At apparent magnitude 9.72, a small backyard telescope will bring it into view.

Like any astronomical target, HIP 61997 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 61997 is an uncommon variable star

HIP 61997 scores 25 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 9 points would lift it into a rarer tier.

That score comes from 5 science badges — Variable star, Under the Southern Cross, White A-type 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.