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Trash exoplanet 9 EP

HIP 74890 b

RA 229.5715° · Dec -41.4211° · exoplanet

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Score breakdown

· 2 badges
9 pts · Trash
Trash 15 pts → Common
  • Confirmed exoplanet +5
  • Gas giant +4
Total score 9

6 more points to reach Common.

Badges

  • Confirmed exoplanet · +5
  • Gas giant · +4

Trivia

What it actually is

  • What it is made of. Too light to be solid rock and too heavy to be all gas: most likely a deep global ocean or a thick steamy envelope over a rocky core.

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 7 it is just past naked-eye reach — ordinary binoculars will pull it in.
  • 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 May — 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. ≈ 4.5 million years at Voyager 1's speed (17 km/s).
  • Fastest probe ever. ≈ 400.6 thousand years even at the Parker Solar Probe's 192 km/s.

Properties

density gcc
1.78
diameter km
169657.46
discovery facility
Multiple Observatories
discovery method
Radial Velocity
discovery year
2016
dist ly
256.5419
eccentricity
0.07
eq temp k
387.66
host star teff
4850
insolation
3.7188
mag
7.05
mass earth
762.792
name
HIP 74890 b
orbital period days
822.3
radius earth
13.3
semi major au
2.1
spect
K1 III
sys num planets
1
sys num stars
1

About HIP 74890 b

HIP 74890 b is a trash exoplanet. It lies about 256.5 light-years from Earth, shines at apparent magnitude 7.05, has spectral type K1 III and has an equilibrium temperature near 388 K.

Too light to be solid rock and too heavy to be all gas: most likely a deep global ocean or a thick steamy envelope over a rocky core.

How to see it

At apparent magnitude 7.05, it is an easy target for binoculars.

Like any astronomical target, HIP 74890 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 HIP 74890 b is a trash exoplanet

HIP 74890 b scores 9 points on Spacedle's rarity scale, which places it in the trash tier. Another 6 points would lift it into a rarer tier.

That score comes from 2 science badges — Confirmed exoplanet and Gas giant — 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.