1999 GR21

1999GR21, 2000 RR66, 2000RR66, 35739, J99G21R, K00R66R

All data for this body: [vot]

MPC data
Name (number) 1999 GR21 (35739)
a 2.24261
e 0.11253
i / sin(i) 7.9541 / 0.13838
q 1.99025
Q 2.49496
ω 128.1871
Node 156.3095
m 208.7491
n 0.2935
Epoch 2460800.5
nobs 2581
nopp 20
Years observed 1992-2025
rms 0.71
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.243
ep 0.074
sin(ip) 0.140
G 0.150
H 15.160
Mass
D 3.18 0.157
pV 0.133 0.0286
Value
Rotational Period
Period quality None
Spectral Class X
Spectral Class Score 9.323
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.2425 0.0743 0.1396 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
3.18 0.157 0.157 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.133 0.0286 0.0286 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
15.16 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 0.57 Bus VIS Carvano 2010A&A...510A..43C PHOT
Cgx Cgx None None Movis NIR Popescu 2018A&A...617A..12P PHOT
X DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
X X 0.4008 0.6610 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
X X 0.8197 0.6610 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT