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Comet

Siding Spring

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C/2007 Q3 (Siding Spring)

Orbital elements

Semi-major axis
-9,474.438 AU
Eccentricity
1.0002
Inclination
65.65°
Perihelion
2.252 AU
Longitude of ascending node
149.41°
Argument of periapsis
2.09°
Epoch · J2000
JD 2455111.77073 (perihelion)
Orbit class · HYP
Hyperbolic comet
Earth MOID · 491.0 LD
1.2618 AU
Tisserand (Jupiter)
0.767

Orbit quality

Observations used
1,341
Data arc
4.02 years
First observed
25 August 2007
Last observed
3 September 2011
Residual RMS
0.69 ″
Solution · Otto Matic
7 July 2025

Visual & observation

Absolute magnitude (H)
8.8
Total magnitude M₁ · K₁ 5.5
8.8

Discovery & classification

Also known as 2007 Q3

Named

Sources