1999 HC9

1999HC9, 18762, 1978 QZ, 1978QZ, 1989 AE10, 1989AE10, 1989 AW4, 1989AW4, 3171 T-1, 3171T-1, J78Q00Z, J89A04W, J89A10E, J99H09C, T1S3171

All data for this body: [vot]

MPC data
Name (number) 1999 HC9 (18762)
a 2.12434
e 0.18751
i / sin(i) 1.9781 / 0.03452
q 1.72600
Q 2.52268
ω 45.4603
Node 303.7409
m 17.2636
n 0.3183
Epoch 2460800.5
nobs 2345
nopp 24
Years observed 1971-2025
rms 0.73
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.114
ep 0.094
sin(ip) 0.050
G 0.150
H 15.160
Mass
D 1.96 0.430
pV 0.320 0.1200
Value
Rotational Period
Period quality None
Spectral Class S
Spectral Class Score 22.157
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.1135 0.0938 0.0502 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
1.96 0.430 0.430 Nugent 2016AJ....152...63N NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.320 0.1200 0.1200 Nugent 2016AJ....152...63N 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
15.16 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
S 0.714 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
S S 0.9793 0.9950 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
S S 0.9997 0.9950 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
S S 0.9999 0.9950 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT