About 343158 Marsyas (2009 HC82)
343158 Marsyas (2009 HC82) is an epic neo. It swings within 0.488 AU of the Sun at perihelion.
Orbits against the grain — retrograde to almost everything else.
Epic neo 53 EP
343158 Marsyas (2009 HC82)
Position computed live · sbdb
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Live ephemeris
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Score breakdown
· 5 badgesEpic 68 pts → Anomaly
- Retrograde orbit +18
- Crosses Earth's orbit +12
- Wildly elliptical orbit +10
- Has a proper name +8
- Near-Earth object +5
Total score 53
15 more points to reach Anomaly.
Badges
- Near-Earth object · +5
- Retrograde orbit · +18
- Wildly elliptical orbit · +10
- Crosses Earth's orbit · +12
- Has a proper name · +8
Trivia
What makes it special
- Backwards orbit. Orbits against the grain — retrograde to almost everything else.
How we found it
- Named. Notable enough to have earned a proper name, not just a catalogue number.
Cosmic context
- Wild orbit. Its highly elliptical path swings between scorching and frozen each lap.
- Ancient. A leftover from the Solar System's birth, older than every continent on Earth.
Properties
- eccentricity
- 0.8068
- h mag
- 16.31
- inclination
- 154.35
- name
- 343158 Marsyas (2009 HC82)
- named
- yes
- orbit class
- APO
- perihelion au
- 0.4882
- semi major au
- 2.527
How to see it
Like any astronomical target, 343158 Marsyas (2009 HC82) 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. Because it moves against the background stars, the live position panel on this page tracks where it is right now. The visibility panel above works out tonight's viewing window for your saved location.
Why 343158 Marsyas (2009 HC82) is an epic neo
343158 Marsyas (2009 HC82) scores 53 points on Spacedle's rarity scale, which places it in the epic tier. Another 15 points would lift it into a rarer tier.
That score comes from 5 science badges — Near-Earth object, Retrograde orbit, Wildly elliptical orbit, Crosses Earth's orbit and Has a proper name — 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.