Trash star 11 EP

HD 37709

RA 85.4125° · Dec 25.5135° · star

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Score breakdown

· 3 badges

11 pts · Trash

Trash 15 pts → Common

White A-type star +5
Star +3
On the zodiac +3

Total score 11

4 more points to reach Common.

Badges

Star · +3
On the zodiac · +3
White A-type star · +5

Trivia

Hard to believe

True brightness. It pours out about 3.6 million times as much light as the Sun. It only looks ordinary because it is so far away.

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.

Find it in the sky

How to spot it. At magnitude 8.4 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Taurus.
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 December — that's when to go looking.

Its true colour

Its true colour. Measured through blue and visual filters it comes out brilliant white (B−V 0) — hotter and whiter than the Sun, the colour of Sirius or Vega.
Why no green stars. No star ever looks green: a surface hot enough to peak in green also floods out plenty of red and blue, and your eye blends the mixture back to white.

By the numbers

Surface temperature. Its colour puts the surface at roughly 10060 K, against the Sun's 5778 K.

Properties

absmag: -11.55
bv: 0.005
constellation: Tau
luminosity: 3630780.5477
mag: 8.45
name: HD 37709
spect: A

Nearby objects

About HD 37709

HD 37709 is a trash star. It sits in the constellation Tau, shines at apparent magnitude 8.45 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 HD 37709 in the constellation Tau. At apparent magnitude 8.45, it is an easy target for binoculars.

Like any astronomical target, HD 37709 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 37709 is a trash star

HD 37709 scores 11 points on Spacedle's rarity scale, which places it in the trash tier. Another 4 points would lift it into a rarer tier.

That score comes from 3 science badges — Star, On the zodiac and White A-type 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.