1999 GL21

1999GL21, 18754, 1978 TB9, 1978TB9, 1989 UT9, 1989UT9, 2000 ON50, 2000ON50, J78T09B, J89U09T, J99G21L, K00O50N

All data for this body: [vot]

MPC data
Name (number) 1999 GL21 (18754)
a 2.39424
e 0.11675
i / sin(i) 7.2652 / 0.12646
q 2.11470
Q 2.67378
ω 252.7006
Node 39.1722
m 301.3496
n 0.2660
Epoch 2460800.5
nobs 4929
nopp 22
Years observed 1978-2025
rms 0.62
Best values
[raw, vot]

Value Standard error
Parent Vesta (4)
 
ap 2.394
ep 0.098
sin(ip) 0.117
G 0.150
H 13.690
Mass
D 4.42 0.174
pV 0.360 0.0716
Value
Rotational Period 5.670
Period quality 2-
Spectral Class V
Spectral Class Score 1.000
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
4 Vesta 0 Vesta Novakovic 2019EPSC...13.1671N HCM
4 Vesta 401 Vesta Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.3945 0.0984 0.1173 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
4.42 0.174 0.174 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.360 0.0716 0.0716 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
13.69 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
5.676 2- Synodic Erasmus 2020ApJS..247...13E Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
V Popescu NIR Mansour 2020MNRAS.491.5966M SPEC+PHOT
V V None None Movis NIR Popescu 2018A&A...617A..12P PHOT