← Back to dex
Common star 19 EP

HD 198078

RA 312.0769° · Dec -13.4887° · star

Loading sky survey…
🌌 View in 3D star map
Tonight’s visibility

Computing the sky for your location…

Score breakdown

· 5 badges
19 pts · Common
Common 22 pts → Uncommon
  • Distant (over 1,000 light-years) +6
  • White A-type star +5
  • Star +3
  • On the zodiac +3
  • Main-sequence star +2
Total score 19

3 more points to reach Uncommon.

Badges

  • Star · +3
  • Distant (over 1,000 light-years) · +6
  • On the zodiac · +3
  • White A-type star · +5
  • Main-sequence star · +2

Trivia

What it actually is

  • Spectral class. Its spectrum reads A3V — 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.

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 Aquarius.
  • 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 August — that's when to go looking.

Could we get there?

  • Verdict. Impossible with our current technology — and the next millennium of it.

Getting there

  • Aboard Voyager 1. ≈ 20.4 million years at Voyager 1's speed (17 km/s).

Properties

absmag
1.944
bv
0.247
constellation
Aqr
dist ly
1160.6976
luminosity
14.5345
mag
9.7
name
HD 198078
spect
A3V

About HD 198078

HD 198078 is a common star. It lies about 1,160.7 light-years from Earth, sits in the constellation Aqr, shines at apparent magnitude 9.7 and has spectral type A3V.

Its spectrum reads A3V — 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 198078 in the constellation Aqr. At apparent magnitude 9.7, a small backyard telescope will bring it into view.

Like any astronomical target, HD 198078 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 198078 is a common star

HD 198078 scores 19 points on Spacedle's rarity scale, which places it in the common tier. Another 3 points would lift it into a rarer tier.

That score comes from 5 science badges — Star, Distant (over 1,000 light-years), On the zodiac, White A-type star and Main-sequence 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.