1997 GQ21

1997GQ21, 1999 TO157, 1999TO157, 37770, J97G21Q, J99TF7O

All data for this body: [vot]

MPC data
Name (number) 1997 GQ21 (37770)
a 3.19387
e 0.07902
i / sin(i) 4.7655 / 0.08308
q 2.94150
Q 3.44623
ω 352.3469
Node 207.0801
m 335.7217
n 0.1727
Epoch 2460800.5
nobs 1140
nopp 21
Years observed 1997-2025
rms 0.89
Best values
[raw, vot]

Value Standard error
Parent Hygiea (10)
 
ap 3.187
ep 0.122
sin(ip) 0.091
G 0.150
H 14.730
Mass
D 4.68 1.311
pV 0.128 0.0419
Value
Rotational Period
Period quality None
Spectral Class Ds
Spectral Class Score 1.000
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
10 Hygiea 0 Hygiea Novakovic 2019EPSC...13.1671N HCM
10 Hygiea 601 Hygiea Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.1869 0.1221 0.0913 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
4.68 1.311 1.311 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.128 0.0419 0.0419 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
14.73 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 Ad None None Movis NIR Popescu 2018A&A...617A..12P PHOT