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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