Johnspencer

07554, 1981 GQ, 1981GQ, J81G00Q

All data for this body: [vot]

MPC data
Name (number) Johnspencer (7554)
a 3.16650
e 0.24971
i / sin(i) 13.6411 / 0.23584
q 2.37578
Q 3.95722
ω 157.0389
Node 13.1022
m 353.7134
n 0.1749
Epoch 2460800.5
nobs 3367
nopp 26
Years observed 1978-2025
rms 0.70
Best values
[raw, vot]

Value Standard error
Parent
 
ap 3.085
ep 0.350
sin(ip) 0.220
G 0.150
H 12.980
Mass
D 15.69 0.318
pV 0.054 0.0117
Value
Rotational Period
Period quality None
Spectral Class Ds
Spectral Class Score 1.000
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.0849 0.3502 0.2202 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
15.10 4.970 4.970 Masiero 2021PSJ.....2..162M NEATM
15.69 0.319 0.319 Masiero 2011ApJ...741...68M NEATM
17.73 5.540 5.540 Masiero 2021PSJ.....2..162M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.050 0.0220 0.0400 Masiero 2021PSJ.....2..162M NEATM
0.053 0.0260 0.0530 Masiero 2021PSJ.....2..162M NEATM
0.054 0.0133 0.0133 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
12.98 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
Ds Ds None None Movis NIR Popescu 2018A&A...617A..12P PHOT