Hephaistos

02212, 1978 SB, 1978SB, J78S00B

All data for this body: [vot]

MPC data
Name (number) Hephaistos (2212)
a 2.16739
e 0.83508
i / sin(i) 11.2268 / 0.19469
q 0.35744
Q 3.97735
ω 210.3492
Node 26.7023
m 246.5052
n 0.3089
Epoch 2460800.5
nobs 3939
nopp 39
Years observed 1978-2025
rms 0.68
Best values
[raw, vot]

Value Standard error
Parent
 
ap
ep
sin(ip)
G 0.150
H 13.500
Mass
D 5.12 0.038
pV 0.178 0.0254
Value
Rotational Period 48.000
Period quality 2
Spectral Class Q
Spectral Class Score 48.930
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
3.57 0.085 0.085 Mainzer 2012ApJ...760L..12M NEATM
5.18 0.160 0.160 Usui 2011PASJ...63.1117U NEATM
5.54 0.044 0.044 Mainzer 2011ApJ...743..156M NEATM
5.99 1.200 1.200 Ali-Lagoa 2018A&A...612A..85A NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.163 0.0270 0.0270 Mainzer 2011ApJ...743..156M NEATM
0.253 0.1010 0.1010 Ali-Lagoa 2018A&A...612A..85A NEATM
0.342 0.1110 0.1110 Mainzer 2012ApJ...760L..12M 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
13.50 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
20.0 1 Synodic Pravec 1997Icar..130..275P Lightcurve
48.0 2 Synodic Warner 2021MPBu...48..170W Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
Q Bus-DeMeo VISNIR Binzel 2019Icar..324...41B SPEC
Q 0.990000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC
Q Sq Bus-DeMeo VISNIR DeMeo 2014Icar..227..112D SPEC
S/D Tholen VIS Hasegawa 2018PASJ...70..114H PHOT
Sq Bus-DeMeo NIR Gietzen 2012M&PS...47.1789G SPEC
Sq Bus-DeMeo VISNIR Hasegawa 2018PASJ...70..114H SPEC+PHOT