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Trash variable star 13 EP

HD 18995

RA 45.8674° · Dec 6.2267° · star

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Score breakdown

· 4 badges
13 pts · Trash
Trash 15 pts → Common
  • Variable star +5
  • Yellow-white F-type star +3
  • A named variable star +3
  • Barely variable (under 0.05 mag) +2
Total score 13

2 more points to reach Common.

Badges

  • Variable star · +5
  • Yellow-white F-type star · +3
  • Barely variable (under 0.05 mag) · +2
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads F0 — an F-type star — a little hotter, whiter and shorter-lived than the Sun.
  • 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 6.7 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Cetus.
  • Seen from everywhere. It sits almost on the celestial equator, so it can be seen from essentially anywhere on Earth.
  • Best time of year. It stands highest in the middle of the night around November — 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. ≈ 4.4 million years at Voyager 1's speed (17 km/s).

Properties

absmag
2.301
bv
0.342
constellation
Cet
dist ly
249.5455
luminosity
10.4616
mag
6.72
name
HD 18995
spect
F0
var amplitude
0.03
var designation
HT
var max
6.705
var min
6.735

About HD 18995

HD 18995 is a trash variable star. It lies about 249.5 light-years from Earth, sits in the constellation Cet, shines at apparent magnitude 6.72 and has spectral type F0.

Its spectrum reads F0 — an F-type star — a little hotter, whiter and shorter-lived than the Sun.

How to see it

Look for HD 18995 in the constellation Cet. At apparent magnitude 6.72, it is an easy target for binoculars.

Like any astronomical target, HD 18995 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 18995 is a trash variable star

HD 18995 scores 13 points on Spacedle's rarity scale, which places it in the trash tier. Another 2 points would lift it into a rarer tier.

That score comes from 4 science badges — Variable star, Yellow-white F-type star, Barely variable (under 0.05 mag) 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.