1999 TR221

1999TR221, 1998 HM116, 1998HM116, 44810, J98HB6M, J99TM1R

All data for this body: [vot]

MPC data
Name (number) 1999 TR221 (44810)
a 2.19196
e 0.13982
i / sin(i) 7.7196 / 0.13432
q 1.88548
Q 2.49845
ω 223.7964
Node 142.6978
m 334.1297
n 0.3037
Epoch 2460800.5
nobs 2275
nopp 21
Years observed 1989-2025
rms 0.75
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.192
ep 0.091
sin(ip) 0.134
G 0.150
H 14.970
Mass
D 3.65 0.181
pV 0.145 0.0340
Value
Rotational Period 5.324
Period quality 2
Spectral Class S
Spectral Class Score 6.221
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.1920 0.0912 0.1341 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
3.65 0.181 0.181 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.145 0.0340 0.0340 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
14.97 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
5.32446 2 Sidereal Durech 2023A&A...675A..24D Model
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
A 0.283 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
L&D V DeMeo-Carry VIS Choi 2023PSJ.....4...49C PHOT
LS 0.18 Bus VIS Carvano 2010A&A...510A..43C PHOT
S DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
S S 0.7035 0.7035 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT