Helewalda

01845, 1931 VC1, 1931VC1, 1954 GG, 1954GG, 1971 OR, 1971OR, 1971 QX2, 1971QX2, 1972 UC, 1972UC, J31V01C, J54G00G, J71O00R, J71Q02X, J72U00C

All data for this body: [vot]

MPC data
Name (number) Helewalda (1845)
a 2.96984
e 0.05347
i / sin(i) 10.7148 / 0.18592
q 2.81104
Q 3.12864
ω 321.3125
Node 142.3744
m 33.2899
n 0.1926
Epoch 2460800.5
nobs 6432
nopp 37
Years observed 1931-2025
rms 0.60
Best values
[raw, vot]

Value Standard error
Parent Eos (221)
 
ap 2.970
ep 0.073
sin(ip) 0.173
G 0.150
H 11.270
Mass
D 20.36 0.137
pV 0.130 0.0088
Value
Rotational Period 7.278
Period quality 3-
Spectral Class X
Spectral Class Score 5.370
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
221 Eos 0 Eos Novakovic 2019EPSC...13.1671N HCM
221 Eos 606 Eos -2.1800 Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.9702 0.0734 0.1729 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
19.93 0.380 0.380 Masiero 2014ApJ...791..121M NEATM
20.43 0.147 0.147 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.129 0.0185 0.0185 Masiero 2011ApJ...741...68M NEATM
0.130 0.0100 0.0100 Masiero 2014ApJ...791..121M 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
11.27 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
3.69829 2 Synodic Pal 2020ApJS..247...26P Lightcurve
7.2786 3- Synodic Behrend LCDB Lightcurve
7.35 2- Synodic DeGraff 2017MPBu...44..350D Lightcurve
7.398 2 Synodic Waszczak 2015AJ....150...75W Lightcurve
7.3982 2 Sidereal Durech 2020A&A...643A..59D Model
7.399 2 Synodic Carbo 2009MPBu...36..152C Lightcurve
7.4 2+ Synodic Brinsfield 2010MPBu...37..146B Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
X 0.895 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT