1999 HA8

1999HA8, 18761, 1978 WK11, 1978WK11, 1984 HT1, 1984HT1, J78W11K, J84H01T, J99H08A

All data for this body: [vot]

MPC data
Name (number) 1999 HA8 (18761)
a 2.42913
e 0.18832
i / sin(i) 0.3985 / 0.00695
q 1.97168
Q 2.88659
ω 214.5887
Node 37.3362
m 272.9457
n 0.2603
Epoch 2460800.5
nobs 2292
nopp 22
Years observed 1984-2025
rms 0.78
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.428
ep 0.201
sin(ip) 0.015
G 0.150
H 14.890
Mass
D 6.50 0.067
pV 0.059 0.0048
Value
Rotational Period
Period quality None
Spectral Class C
Spectral Class Score 2.844
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.4283 0.2010 0.0149 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
4.65 1.420 1.420 Nugent 2016AJ....152...63N NEATM
4.79 1.310 1.310 Masiero 2020PSJ.....1....5M NEATM
6.51 0.067 0.067 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.058 0.0048 0.0048 Masiero 2011ApJ...741...68M NEATM
0.080 0.0600 0.0600 Nugent 2016AJ....152...63N NEATM
0.093 0.0750 0.0750 Masiero 2020PSJ.....1....5M 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
14.89 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
C 0.474 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT