Heimdal

03990, 1971 QJ3, 1971QJ3, 1972 TG2, 1972TG2, 1972 XM, 1972XM, 1979 SA3, 1979SA3, 1987 SO3, 1987SO3, 1988 XK2, 1988XK2, J71Q03J, J72T02G, J72X00M, J79S03A, J87S03O, J88X02K

All data for this body: [vot]

MPC data
Name (number) Heimdal (3990)
a 3.94401
e 0.24202
i / sin(i) 9.4954 / 0.16497
q 2.98950
Q 4.89852
ω 198.1225
Node 192.5954
m 262.5598
n 0.1258
Epoch 2460800.5
nobs 7198
nopp 31
Years observed 1972-2025
rms 0.51
Best values
[raw, vot]

Value Standard error
Parent Hilda (153)
 
ap 3.965
ep 0.167
sin(ip) 0.168
G 0.150
H 11.010
Mass
D 35.67 0.370
pV 0.067 0.0100
Value
Rotational Period 45.800
Period quality 2+
Spectral Class D
Spectral Class Score 15.443
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
153 Hilda 1 Hilda Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.9651 0.1671 0.1677 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
35.67 0.370 0.370 Grav 2012ApJ...744..197G NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.067 0.0100 0.0100 Grav 2012ApJ...744..197G 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
11.01 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
20.0 Synodic Slyusarev LCDB Lightcurve
45.83 2+ Synodic Warner 2021MPBu...48..303W Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
D Bus VIS Lazzaro 2004Icar..172..179L SPEC
D Tholen VIS Lazzaro 2004Icar..172..179L SPEC
D D 0.9071 0.9071 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
S 1.000000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC