1991 VP12

1991VP12, 1997 ES1, 1997ES1, 42495, J91V12P, J97E01S

All data for this body: [vot]

MPC data
Name (number) 1991 VP12 (42495)
a 2.54623
e 0.12812
i / sin(i) 5.5110 / 0.09604
q 2.22001
Q 2.87244
ω 238.7324
Node 73.3735
m 180.7198
n 0.2426
Epoch 2460800.5
nobs 2000
nopp 22
Years observed 1991-2025
rms 0.78
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.547
ep 0.109
sin(ip) 0.072
G 0.150
H 15.200
Mass
D 2.54 0.292
pV 0.239 0.0550
Value
Rotational Period
Period quality None
Spectral Class L
Spectral Class Score 1.302
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.5470 0.1086 0.0718 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
2.49 0.340 0.340 Masiero 2012ApJ...759L...8M NEATM
2.69 0.567 0.567 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.222 0.0612 0.0612 Masiero 2011ApJ...741...68M NEATM
0.313 0.1260 0.1260 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
15.20 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
A A 0.1702 0.1702 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
L 0.217 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
LS 0.08 Bus VIS Carvano 2010A&A...510A..43C PHOT