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Monday, May 16, 2022

2015 EN80 and 2017 XP90

These two asteroids share a very similar orbit and they have a very similar absolute magnitude and size (assuming 10% albedo, their size is 1102 and 1180 meters respectively)

Orbital elements:  2015 EN80
   Perihelion 2021 Jun 24.35763 +/- 0.00111 TT =  8:34:58 (JD 2459389.85763)
Epoch 2022 Mar 23.0 TT = JDT 2459661.5                        Auto-Find
M  66.70829243 +/- 0.00027          (J2000 ecliptic)
n   0.24557395 +/- 5.89e-9          Peri.  282.14566 +/- 0.00019
a   2.52550274 +/- 4.04e-8          Node    98.81297 +/- 0.00006
e   0.1644376 +/- 1.73e-6           Incl.   16.06226 +/- 0.000033
P   4.01                   H 17.9   G  0.15   U  0.8
q 2.11021511 +/- 4.37e-6    Q 2.94079038 +/- 4.35e-6
From 46 observations 2005 Dec. 24-2022 Mar. 23; mean residual 0".33
 
Orbital elements:  2017 XP90
   Perihelion 2021 Jun 26.30182 +/- 0.00152 TT =  7:14:37 (JD 2459391.80182)
Epoch 2022 Jan  6.0 TT = JDT 2459585.5                        Auto-Find
M  47.57079914 +/- 0.00037          (J2000 ecliptic)
n   0.24559239 +/- 6.59e-9          Peri.  282.12973 +/- 0.00025
a   2.52537634 +/- 4.52e-8          Node    98.81216 +/- 0.000059
e   0.1644239 +/- 2.44e-6           Incl.   16.06218 +/- 0.000028
P   4.01                   H 17.8   G  0.15   U  0.9
q 2.11014391 +/- 6.17e-6    Q 2.94060878 +/- 6.12e-6
From 45 observations 2006 Jan. 23-2022 Jan. 6; mean residual 0".21 
Based on the nominal parameters, they might have a potential common origin:

 

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