1999 AR21

1999AR21, 1997 TA22, 1997TA22, 31413, J97T22A, J99A21R

All data for this body: [vot]

MPC data
Name (number) 1999 AR21 (31413)
a 2.30102
e 0.07925
i / sin(i) 1.8220 / 0.03179
q 2.11867
Q 2.48338
ω 230.0675
Node 301.0725
m 158.6893
n 0.2824
Epoch 2460800.5
nobs 2018
nopp 21
Years observed 1997-2025
rms 0.76
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.301
ep 0.121
sin(ip) 0.042
G 0.150
H 15.610
Mass
D 2.57 0.313
pV 0.186 0.0383
Value
Rotational Period
Period quality None
Spectral Class S
Spectral Class Score 7.227
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.3012 0.1215 0.0420 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
2.41 0.798 0.798 Masiero 2011ApJ...741...68M NEATM
2.60 0.340 0.340 Masiero 2012ApJ...759L...8M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.180 0.0400 0.0400 Masiero 2012ApJ...759L...8M NEATM
0.253 0.1313 0.1313 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
15.61 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
Ad Ad None None Movis NIR Popescu 2018A&A...617A..12P PHOT
D S 0.1508 0.4680 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
D S 0.3063 0.4680 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
S 0.11 Bus VIS Carvano 2010A&A...510A..43C PHOT
S S 0.4745 0.4680 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
S S 0.6933 0.4680 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
X 0.321 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT