← Back to dex
Rare exoplanet 43 EP

nu Oct A b

RA 325.3703° · Dec -77.3911° · exoplanet

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

Computing the sky for your location…

Score breakdown

· 5 badges
43 pts · Rare
Rare 50 pts → Epic
  • Its star is visible to the naked eye +12
  • Two suns in its sky +12
  • Disputed — it may not be there at all +10
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 43

7 more points to reach Epic.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4
  • Its star is visible to the naked eye · +12
  • Two suns in its sky · +12
  • Disputed — it may not be there at all · +10

Trivia

What it actually is

  • What it is made of. Lighter than Neptune — a puffed-up ball of hydrogen and helium with no surface anywhere on it to stand on.

Sense of scale

  • In perspective. Inside our stellar backyard: every radio broadcast humanity has ever made has already swept past it.

Find it in the sky

  • How to spot it. At magnitude 3.7 you can see it with your own eyes from a dark site.
  • Southern sky only. So far south it never rises for most of the northern hemisphere. To see it you'd have to travel to Chile, South Africa or Australia.
  • 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. Hopelessly far for any craft humanity can build today.

Getting there

  • Aboard Voyager 1. ≈ 1.2 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 108 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

controversial
yes
density gcc
1.63
diameter km
169657.46
discovery facility
University of Canterbury Mt John Observatory
discovery method
Radial Velocity
discovery year
2016
dist ly
69.1447
eccentricity
0.195
eq temp k
477.33
host star teff
4910
inclination
108.2
insolation
8.5848
mag
3.73
mass earth
696.0442
multi star system
yes
name
nu Oct A b
orbital period days
402.4
radius earth
13.3
semi major au
1.24
spect
K1 IV
sys num planets
1
sys num stars
2

About nu Oct A b

nu Oct A b is a rare exoplanet. It lies about 69.1 light-years from Earth, shines at apparent magnitude 3.73, has spectral type K1 IV and has an equilibrium temperature near 477 K.

Lighter than Neptune — a puffed-up ball of hydrogen and helium with no surface anywhere on it to stand on.

How to see it

At apparent magnitude 3.73, it can be glimpsed with the unaided eye under dark skies.

Like any astronomical target, nu Oct A b 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 nu Oct A b is a rare exoplanet

nu Oct A b scores 43 points on Spacedle's rarity scale, which places it in the rare tier. Another 7 points would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Gas giant, Its star is visible to the naked eye, Two suns in its sky and Disputed — it may not be there at all — 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.