1999 UA1

1999UA1, 40991, J99U01A

All data for this body: [vot]

MPC data
Name (number) 1999 UA1 (40991)
a 2.42874
e 0.24902
i / sin(i) 7.5297 / 0.13104
q 1.82393
Q 3.03355
ω 298.7983
Node 34.0085
m 306.4370
n 0.2604
Epoch 2460800.5
nobs 1554
nopp 20
Years observed 1998-2025
rms 0.77
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.428
ep 0.209
sin(ip) 0.125
G 0.150
H 15.260
Mass
D 2.10 0.358
pV 0.440 0.1750
Value
Rotational Period
Period quality None
Spectral Class S
Spectral Class Score 7.444
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.4283 0.2095 0.1249 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
2.10 0.358 0.358 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.440 0.1750 0.1750 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
15.26 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
A 0.07 Bus VIS Carvano 2010A&A...510A..43C PHOT
S 0.840 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
S S 0.4006 0.3950 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
V S 0.0762 0.3950 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT