About 2008 UY91
2008 UY91 is an uncommon neo. It swings within 0.688 AU of the Sun at perihelion.
Its orbit genuinely intersects Earth's track around the Sun. The two paths cross; only the timing keeps them apart.
Uncommon neo 27 EP
2008 UY91
Position computed live · sbdb
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Live ephemeris
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Score breakdown
· 5 badgesUncommon 34 pts → Rare
- Wildly elliptical orbit +10
- Crosses Earth's orbit +8
- Near-Earth object +5
- Apollo: crosses Earth's orbit +4
- Catalogue designation only +0
Total score 27
7 more points to reach Rare.
Badges
- Near-Earth object · +5
- Wildly elliptical orbit · +10
- Crosses Earth's orbit · +8
- Catalogue designation only
- Apollo: crosses Earth's orbit · +4
Trivia
What makes it special
- It crosses our path. Its orbit genuinely intersects Earth's track around the Sun. The two paths cross; only the timing keeps them apart.
What it actually is
- Its orbit family. An Apollo-class object: its orbit is wider than Earth's but crosses it. Most known Earth-crossers belong to this family.
- Closest approach. At its nearest it comes within 0.69 AU of the Sun — inside the orbit of Venus.
- One lap. A single orbit around the Sun takes it about 19.8 years.
- How far it roams. Its orbit swings between 0.69 and 13.94 AU from the Sun.
Sense of scale
- Sense of scale. In everyday terms it is about 0.5 football pitches across.
Standing on it
- Don't jump. Escape velocity here is only around 0.03 m/s. A determined jump would launch you off it and into your own orbit around the Sun.
By the numbers
- Estimated size. Nobody has measured its size directly. Assuming it reflects light like a typical asteroid, its brightness implies something roughly 54 metres across.
Properties
- aphelion au
- 13.94
- designation
- 2008 UY91
- eccentricity
- 0.906
- full name
- (2008 UY91)
- h mag
- 24.11
- inclination
- 32.39
- mean motion deg day
- 0.0498
- moid au
- 0.109
- name
- 2008 UY91
- number only
- yes
- orbit class
- APO
- perihelion au
- 0.688
- semi major au
- 7.315
How to see it
Like any astronomical target, 2008 UY91 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 2008 UY91 is an uncommon neo
2008 UY91 scores 27 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 7 points would lift it into a rarer tier.
That score comes from 5 science badges — Near-Earth object, Wildly elliptical orbit, Crosses Earth's orbit, Catalogue designation only and Apollo: crosses Earth's orbit — 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.