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Epic variable star 54 EP

HR 1648

RA 76.3488° · Dec 1.1776° · star

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Score breakdown

· 7 badges
54 pts · Epic
Epic 78 pts → Anomaly
  • Fades out of naked-eye view +16
  • Strongly variable +10
  • Deep red star +8
  • Distant (over 1,000 light-years) +6
  • In Orion's hunting ground +6
  • Variable star +5
  • A named variable star +3
Total score 54

24 more points to reach Anomaly.

Badges

  • Variable star · +5
  • Distant (over 1,000 light-years) · +6
  • In Orion's hunting ground · +6
  • Deep red star · +8
  • Strongly variable · +10
  • Fades out of naked-eye view · +16
  • A named variable star · +3

Trivia

What it actually is

  • Spectral class. Its spectrum reads N5 — a carbon star, wrapped in so much soot that its light is filtered to a deep ruby red.
  • 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 6.1 it is just past naked-eye reach — ordinary binoculars will pull it in, over in Orion.
  • 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 December — 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. ≈ 21.6 million years at Voyager 1's speed (17 km/s).

Properties

absmag
-1.784
bv
3.332
constellation
Ori
dist ly
1230.7774
luminosity
450.4017
mag
6.1
name
HR 1648
spect
N5
var amplitude
0.58
var designation
W
var max
5.862
var min
6.442

About HR 1648

HR 1648 is an epic variable star. It lies about 1,230.8 light-years from Earth, sits in the constellation Ori, shines at apparent magnitude 6.1 and has spectral type N5.

Its spectrum reads N5 — a carbon star, wrapped in so much soot that its light is filtered to a deep ruby red.

How to see it

Look for HR 1648 in the constellation Ori. At apparent magnitude 6.1, it is an easy target for binoculars.

Like any astronomical target, HR 1648 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 HR 1648 is an epic variable star

HR 1648 scores 54 points on Spacedle's rarity scale, which places it in the epic tier. Another 24 points would lift it into a rarer tier.

That score comes from 7 science badges — Variable star, Distant (over 1,000 light-years), In Orion's hunting ground, Deep red star, Strongly variable, Fades out of naked-eye view 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.