1999 JS55

1999JS55, 17979, 1990 HA7, 1990HA7, J90H07A, J99J55S

All data for this body: [vot]

MPC data
Name (number) 1999 JS55 (17979)
a 2.78648
e 0.13777
i / sin(i) 10.2266 / 0.17754
q 2.40259
Q 3.17037
ω 216.6082
Node 86.6373
m 160.1035
n 0.2119
Epoch 2460800.5
nobs 3200
nopp 24
Years observed 1990-2025
rms 0.74
Best values
[raw, vot]

Value Standard error
Parent Gefion (1272)
 
ap 2.784
ep 0.128
sin(ip) 0.157
G 0.150
H 13.550
Mass
D
pV
Value
Rotational Period 9.185
Period quality 2
Spectral Class S
Spectral Class Score 6.422
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
1272 Gefion 0 Gefion Novakovic 2019EPSC...13.1671N HCM
1272 Gefion 516 Gefion 0.0000 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.7839 0.1280 0.1568 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
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
13.55 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
9.18544 2 Sidereal Durech 2020A&A...643A..59D Model
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
S 0.25 Bus VIS Carvano 2010A&A...510A..43C PHOT
S 0.987 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT