Uncommon exoplanet 29 EP

HD 34445 d

RA 79.4207° · Dec 7.3527° · exoplanet

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Score breakdown

· 4 badges

29 pts · Uncommon

Uncommon 33 pts → Rare

Richly packed system +14
Multi-planet system +6
Confirmed exoplanet +5
Gas giant +4

Total score 29

4 more points to reach Rare.

Badges

Confirmed exoplanet · +5
Gas giant · +4
Multi-planet system · +6
Richly packed system · +14

Trivia

What makes it special

Packed system. Crammed into a system of five or more planets.

Could we get there?

Verdict. Hopelessly far for any craft humanity can build today.

Getting there

Aboard Voyager 1. ≈ 2.6 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 234.7 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 1503 years in a starship at a tenth of light speed.
Distance. 150 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1876.

Saying hello

Say hello. A radio message and its reply would take 301 years round-trip.

Standing on it

A year here. A full year lasts just 118 Earth days.

By the numbers

Size. About 6.1× the width of Earth.
Volume. About 224 Earths could fit inside it.
Mass. About 30.7× the mass of Earth.
Your weight. You'd weigh about 0.8× your Earth weight standing here.
Density. Less dense than water — drop it in a big enough ocean and it would float.
Temperature. A scorching 203°C on average.

How we found it

Discovery. Found by Multiple Observatories using the radial velocity method.

Cosmic context

Crowded system. One of at least 6 planets orbiting its star.

Properties

density gcc: 0.754
discovery facility: Multiple Observatories
discovery method: Radial Velocity
dist ly: 150.3276
eccentricity: 0.027
eq temp k: 476.32
insolation: 8.6625
mass earth: 30.7
name: HD 34445 d
orbital period days: 117.87
radius earth: 6.07
sys num planets: 6

About HD 34445 d

HD 34445 d is an uncommon exoplanet. It lies about 150.3 light-years from Earth, has an equilibrium temperature near 476 K, spans roughly 6.07 Earth radii and weighs about 30.7 Earth masses.

Crammed into a system of five or more planets.

How to see it

Like any astronomical target, HD 34445 d 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 34445 d is an uncommon exoplanet

HD 34445 d scores 29 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 4 points would lift it into a rarer tier.

That score comes from 4 science badges — Confirmed exoplanet, Gas giant, Multi-planet system and Richly packed system — 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.