Simonhelberg

08625, 1949 SE, 1949SE, 1978 NH5, 1978NH5, 1981 EX15, 1981EX15, J49S00E, J78N05H, J81E15X

All data for this body: [vot]

MPC data
Name (number) Simonhelberg (8625)
a 2.60455
e 0.07929
i / sin(i) 3.6306 / 0.06332
q 2.39805
Q 2.81106
ω 58.4093
Node 326.4339
m 332.3574
n 0.2345
Epoch 2460800.5
nobs 1961
nopp 26
Years observed 1953-2025
rms 0.71
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.605
ep 0.113
sin(ip) 0.076
G 0.150
H 14.680
Mass
D 3.69 0.865
pV 0.247 0.1144
Value
Rotational Period 5.200
Period quality 2
Spectral Class S
Spectral Class Score 3.610
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.6051 0.1131 0.0763 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
3.69 0.865 0.865 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.247 0.1144 0.1144 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
14.68 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
5.267 2 Synodic Waszczak 2015AJ....150...75W Lightcurve
5.27 2 Synodic Chang 2015ApJS..219...27C Lightcurve
5.275 2 Synodic Waszczak 2015AJ....150...75W Lightcurve
5.276 2 Synodic Waszczak 2015AJ....150...75W Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
S 0.131 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
S S 0.4706 0.4706 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT