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Uncommon variable star 23 EP

HD 16515

RA 39.6383° · Dec -14.2991° · star

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Score breakdown

· 5 badges
23 pts · Uncommon
Uncommon 34 pts → Rare
  • Strongly variable +10
  • Variable star +5
  • Yellow-white F-type star +3
  • A named variable star +3
  • Main-sequence star +2
Total score 23

11 more points to reach Rare.

Badges

  • Variable star · +5
  • Yellow-white F-type star · +3
  • Main-sequence star · +2
  • Strongly variable · +10
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads F5V — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
  • 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.

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 9.6 you'll want a small backyard telescope, over in Cetus.
  • Southern sky. It rides the southern half of the sky — an easier target the further south you are.
  • Best time of year. It stands highest in the middle of the night around October — that's when to go looking.

Could we get there?

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

Properties

absmag
2.752
bv
0.474
constellation
Cet
dist ly
746.3526
luminosity
6.9056
mag
9.55
name
HD 16515
spect
F5V
var amplitude
0.56
var designation
DY
var max
9.425
var min
9.985

About HD 16515

HD 16515 is an uncommon variable star. It lies about 746.4 light-years from Earth, sits in the constellation Cet, shines at apparent magnitude 9.55 and has spectral type F5V.

Its spectrum reads F5V — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for HD 16515 in the constellation Cet. At apparent magnitude 9.55, a small backyard telescope will bring it into view.

Like any astronomical target, HD 16515 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 HD 16515 is an uncommon variable star

HD 16515 scores 23 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 11 points would lift it into a rarer tier.

That score comes from 5 science badges — Variable star, Yellow-white F-type star, Main-sequence star, Strongly 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.