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Rare variable star 38 EP

HD 74307

RA 130.9839° · Dec 19.0342° · star

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Score breakdown

· 6 badges
38 pts · Rare
Rare 50 pts → Epic
  • Dramatic variable (over 2 magnitudes) +20
  • Variable star +5
  • White A-type star +5
  • On the zodiac +3
  • A named variable star +3
  • Main-sequence star +2
Total score 38

12 more points to reach Epic.

Badges

  • Variable star · +5
  • On the zodiac · +3
  • White A-type star · +5
  • Main-sequence star · +2
  • Dramatic variable (over 2 magnitudes) · +20
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads A0V — 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.
  • 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 8.3 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Cancer.
  • 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 January — that's when to go looking.

Could we get there?

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

Properties

absmag
0.976
bv
0.098
constellation
Cnc
dist ly
950.8922
luminosity
35.4487
mag
8.3
name
HD 74307
spect
A0V
var amplitude
2.08
var designation
S
var max
8.262
var min
10.342

About HD 74307

HD 74307 is a rare variable star. It lies about 950.9 light-years from Earth, sits in the constellation Cnc, shines at apparent magnitude 8.3 and has spectral type A0V.

Its spectrum reads A0V — 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 HD 74307 in the constellation Cnc. At apparent magnitude 8.3, it is an easy target for binoculars.

Like any astronomical target, HD 74307 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 74307 is a rare variable star

HD 74307 scores 38 points on Spacedle's rarity scale, which places it in the rare tier. Another 12 points would lift it into a rarer tier.

That score comes from 6 science badges — Variable star, On the zodiac, White A-type star, Main-sequence star, Dramatic variable (over 2 magnitudes) 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.