Bruce Helin

BruceHelin, 02430, 1908 WC, 1908WC, 1976 JU1, 1976JU1, 1977 VC, 1977VC, J08W00C, J76J01U, J77V00C

All data for this body: [vot]

MPC data
Name (number) Bruce Helin (2430)
a 2.36334
e 0.21430
i / sin(i) 23.4477 / 0.39791
q 1.85686
Q 2.86981
ω 309.9499
Node 45.8035
m 61.7183
n 0.2713
Epoch 2460800.5
nobs 7245
nopp 27
Years observed 1976-2025
rms 0.51
Best values
[raw, vot]

Value Standard error
Parent Phocaea (25)
 
ap 2.363
ep 0.203
sin(ip) 0.385
G 0.150
H 12.070
Mass
D 11.96 0.148
pV 0.242 0.0237
Value
Rotational Period 128.000
Period quality 2
Spectral Class S
Spectral Class Score 5.000
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
25 Phocaea 0 Phocaea Novakovic 2019EPSC...13.1671N HCM
25 Phocaea 701 Phocaea -0.8700 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.3627 0.2028 0.3854 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
10.98 1.100 1.100 Ali-Lagoa 2018A&A...612A..85A NEATM
11.83 0.170 0.170 Usui 2011PASJ...63.1117U NEATM
12.47 0.320 0.320 Masiero 2012ApJ...759L...8M NEATM
12.69 1.270 1.270 Ali-Lagoa 2018A&A...612A..85A NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.221 0.0440 0.0440 Ali-Lagoa 2018A&A...612A..85A NEATM
0.238 0.0320 0.0320 Masiero 2012ApJ...759L...8M NEATM
0.295 0.0590 0.0590 Ali-Lagoa 2018A&A...612A..85A 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
12.07 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
128.0 2 Synodic Pravec LCDB Lightcurve
129.416 2 Synodic Waszczak 2015AJ....150...75W Lightcurve
129.74152 2 Sidereal Martikainen 2021A&A...649A..98M Model
129.75 2 Sidereal Hanus 2013A&A...559A.134H Model
153.0 2 Synodic Behrend LCDB Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
A 0.304 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
S 1.000000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC
SI Bus VIS Bus 2002Icar..158..146B SPEC
V V 0.7457 0.0690 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT