1999 SP8

1999SP8, 2000 WQ87, 2000WQ87, 42922, J99S08P, K00W87Q

All data for this body: [vot]

MPC data
Name (number) 1999 SP8 (42922)
a 2.80541
e 0.14313
i / sin(i) 10.3131 / 0.17903
q 2.40386
Q 3.20695
ω 345.0606
Node 81.8668
m 95.6646
n 0.2098
Epoch 2460800.5
nobs 5553
nopp 23
Years observed 1955-2025
rms 0.57
Best values
[raw, vot]

Value Standard error
Parent Gefion (1272)
 
ap 2.806
ep 0.135
sin(ip) 0.157
G 0.150
H 13.350
Mass
D 6.44 0.067
pV 0.355 0.0528
Value
Rotational Period 7.339
Period quality 2
Spectral Class S
Spectral Class Score 5.153
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 0.7200 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.8062 0.1347 0.1573 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
6.44 0.067 0.067 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.355 0.0528 0.0528 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
13.35 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
7.3377 2 Sidereal Durech 2023A&A...675A..24D Model
7.3392 2 Synodic Pal 2020ApJS..247...26P Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
LS 0.44 Bus VIS Carvano 2010A&A...510A..43C PHOT
S 0.256 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
S S 0.6029 0.6029 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT