About MXB 1658-298 b
MXB 1658-298 b is an uncommon exoplanet. It spans roughly 12 Earth radii, weighs about 7,532.57 Earth masses, completes an orbit every 760 days and belongs to a system of 1 known planets.
Packed denser than solid iron.
Uncommon exoplanet 27 EP
MXB 1658-298 b
RA 255.5273° · Dec -29.9456° · exoplanet
Score breakdown
· 3 badgesUncommon 33 pts → Rare
- Denser than iron +18
- Confirmed exoplanet +5
- Gas giant +4
Total score 27
6 more points to reach Rare.
Badges
- Confirmed exoplanet · +5
- Gas giant · +4
- Denser than iron · +18
Trivia
What makes it special
- Heavyweight. Packed denser than solid iron.
Standing on it
- A year here. A full year lasts about 2.1 Earth years.
By the numbers
- Size. About 12× the width of Earth.
- Volume. About 1728 Earths could fit inside it.
- Mass. Roughly 7533× Earth's mass — about 23.7 Jupiters.
- Your weight. You'd weigh about 52.3× your Earth weight standing here.
- Density. Denser than solid iron.
How we found it
- Discovery. Found by Multiple Observatories using the eclipse timing variations method.
Properties
- density gcc
- 24
- discovery facility
- Multiple Observatories
- discovery method
- Eclipse Timing Variations
- mass earth
- 7532.571
- name
- MXB 1658-298 b
- orbital period days
- 760
- radius earth
- 12
- sys num planets
- 1
How to see it
Like any astronomical target, MXB 1658-298 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 MXB 1658-298 b is an uncommon exoplanet
MXB 1658-298 b scores 27 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 6 points would lift it into a rarer tier.
That score comes from 3 science badges — Confirmed exoplanet, Gas giant and Denser than iron — 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.