1999 TH221

1999TH221, 2001 AN38, 2001AN38, 91789, J99TM1H, K01A38N

All data for this body: [vot]

MPC data
Name (number) 1999 TH221 (91789)
a 2.75939
e 0.17053
i / sin(i) 10.0124 / 0.17386
q 2.28884
Q 3.22994
ω 322.5847
Node 48.9795
m 210.6414
n 0.2150
Epoch 2460800.5
nobs 1400
nopp 21
Years observed 1990-2025
rms 0.77
Best values
[raw, vot]

Value Standard error
Parent Gefion (1272)
 
ap 2.760
ep 0.129
sin(ip) 0.159
G 0.150
H 15.010
Mass
D 3.14 0.558
pV 0.260 0.0620
Value
Rotational Period
Period quality None
Spectral Class S
Spectral Class Score 2.678
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
1272 Gefion 0 Gefion Novakovic 2019EPSC...13.1671N HCM
1272 Gefion 516 Gefion -0.3600 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.7599 0.1290 0.1586 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
3.14 0.558 0.558 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.260 0.0620 0.0620 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
15.01 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
D S 0.2527 0.3850 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
S S 0.4464 0.3850 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT