1981 SN1

1981SN1, 07990, 1988 DL2, 1988DL2, J81S01N, J88D02L

All data for this body: [vot]

MPC data
Name (number) 1981 SN1 (7990)
a 3.05054
e 0.31584
i / sin(i) 2.3449 / 0.04091
q 2.08706
Q 4.01403
ω 231.1991
Node 144.8821
m 58.4411
n 0.1850
Epoch 2460800.5
nobs 2286
nopp 27
Years observed 1949-2025
rms 0.81
Best values
[raw, vot]

Value Standard error
Parent
 
ap 3.052
ep 0.274
sin(ip) 0.032
G 0.150
H 14.040
Mass
D 8.67 0.503
pV 0.123 0.0264
Value
Rotational Period
Period quality None
Spectral Class C
Spectral Class Score 4.962
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.0516 0.2743 0.0318 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
8.67 0.503 0.503 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.123 0.0264 0.0264 Masiero 2011ApJ...741...68M 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
14.04 MPC-2023-12-04 MPC-2023-12-04 Phot
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
C 0.827 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT