1981 XM2

1981XM2, 07920, 1981 YK, 1981YK, 1991 CN2, 1991CN2, J81X02M, J81Y00K, J91C02N

All data for this body: [vot]

MPC data
Name (number) 1981 XM2 (7920)
a 2.59988
e 0.10656
i / sin(i) 10.8057 / 0.18748
q 2.32284
Q 2.87693
ω 173.0352
Node 257.9990
m 137.9299
n 0.2351
Epoch 2460800.5
nobs 6022
nopp 25
Years observed 1951-2025
rms 0.56
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.599
ep 0.113
sin(ip) 0.202
G 0.150
H 13.320
Mass
D 9.42 0.087
pV 0.173 0.0252
Value
Rotational Period 2.590
Period quality 2
Spectral Class None
Spectral Class Score
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.5993 0.1128 0.2020 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
5.89 0.360 0.360 Masiero 2012ApJ...759L...8M NEATM
9.64 0.090 0.090 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.120 0.0287 0.0287 Masiero 2011ApJ...741...68M NEATM
0.353 0.0530 0.0530 Masiero 2012ApJ...759L...8M NEATM
G data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.15 MPC-2023-12-94 MPC-2023-12-94 Phot
H data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
13.32 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
2.596 2 Synodic Waszczak 2015AJ....150...75W Lightcurve