1999 HT

1999HT, 18757, 1988 PM4, 1988PM4, 1992 QZ2, 1992QZ2, J88P04M, J92Q02Z, J99H00T

All data for this body: [vot]

MPC data
Name (number) 1999 HT (18757)
a 2.44596
e 0.20668
i / sin(i) 1.7725 / 0.03093
q 1.94043
Q 2.95148
ω 108.1228
Node 209.7859
m 212.6744
n 0.2577
Epoch 2460800.5
nobs 2721
nopp 25
Years observed 1950-2025
rms 0.77
Best values
[raw, vot]

Value Standard error
Parent Nysa (44)
 
ap 2.448
ep 0.174
sin(ip) 0.043
G 0.150
H 14.640
Mass
D 3.01 0.768
pV 0.281 0.1574
Value
Rotational Period
Period quality None
Spectral Class L&D
Spectral Class Score 2.000
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
135 Hertha -1 Hertha -1.0000 Nesvorny 2024ApJS..274...25N HCM-2024
135 Hertha 0 Hertha Novakovic 2019EPSC...13.1671N HCM
44 Nysa 405 Nysa-Polana 0.3500 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.4478 0.1738 0.0435 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
3.01 0.768 0.768 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.281 0.1574 0.1574 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
14.64 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
L&D L DeMeo-Carry VIS Choi 2023PSJ.....4...49C PHOT