1998 FG121

1998FG121, 1991 PW19, 1991PW19, 1999 TO126, 1999TO126, 39957, J91P19W, J98FC1G, J99TC6O

All data for this body: [vot]

MPC data
Name (number) 1998 FG121 (39957)
a 2.42584
e 0.20931
i / sin(i) 3.7877 / 0.06606
q 1.91809
Q 2.93359
ω 288.3642
Node 340.2090
m 0.3084
n 0.2609
Epoch 2460800.5
nobs 1233
nopp 20
Years observed 1995-2025
rms 0.78
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.427
ep 0.205
sin(ip) 0.078
G 0.150
H 15.740
Mass
D 2.41 0.113
pV 0.254 0.0581
Value
Rotational Period
Period quality None
Spectral Class C
Spectral Class Score 0.401
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.4272 0.2047 0.0778 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
2.41 0.113 0.113 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.254 0.0581 0.0581 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
15.74 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 C 0.0669 0.0669 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT