About C/2001 OG108 (LONEOS)
C/2001 OG108 (LONEOS) is a rare comet. It swings within 0.994 AU of the Sun at perihelion.
A Halley-type comet: 20 to 200 years per lap, on a steeply tilted orbit that reaches far beyond the planets.
Rare comet 34 EP
C/2001 OG108 (LONEOS)
Position computed live · sbdb
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Live ephemeris
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Score breakdown
· 4 badgesRare 50 pts → Epic
- Halley-type comet +16
- Has a proper name +8
- Comet +6
- Steeply tilted orbit (i > 40°) +4
Total score 34
16 more points to reach Epic.
Badges
- Comet · +6
- Has a proper name · +8
- Halley-type comet · +16
- Steeply tilted orbit (i > 40°) · +4
Trivia
What it actually is
- Its orbit family. A Halley-type comet: 20 to 200 years per lap, on a steeply tilted orbit that reaches far beyond the planets.
- Closest approach. At its nearest it comes within 0.99 AU of the Sun — inside the orbit of Earth.
- One lap. A single orbit around the Sun takes it about 48.5 years.
- How far it roams. Its orbit swings between 0.99 and 25.61 AU from the Sun.
Sense of scale
- Sense of scale. In everyday terms it is roughly 1.5× the height of Mount Everest.
- Walk around it. Walking its equator at a steady pace, eight hours a day, would take about 1.1 days.
Standing on it
- Growing a tail. Once inside roughly the orbit of Mars the ice starts turning straight to gas, blowing out the coma and tail that make a comet a comet.
- Tail. Its tail always points away from the Sun, never trailing behind its motion — it is blown, not dragged.
Properties
- albedo
- 0.054
- aphelion au
- 25.61
- designation
- 2001 OG108
- diameter km
- 13.6
- eccentricity
- 0.9253
- full name
- C/2001 OG108 (LONEOS)
- inclination
- 80.25
- mean motion deg day
- 0.0203
- moid au
- 0.301
- name
- C/2001 OG108 (LONEOS)
- named
- yes
- orbit class
- HTC
- perihelion au
- 0.994
- rotation period h
- 57.12
- semi major au
- 13.3
How to see it
Like any astronomical target, C/2001 OG108 (LONEOS) 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 C/2001 OG108 (LONEOS) is a rare comet
C/2001 OG108 (LONEOS) scores 34 points on Spacedle's rarity scale, which places it in the rare tier. Another 16 points would lift it into a rarer tier.
That score comes from 4 science badges — Comet, Has a proper name, Halley-type comet and Steeply tilted orbit (i > 40°) — 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.