Helio

00895, 1906 MB, 1906MB, 1918 NA, 1918NA, J06M00B, J18N00A

All data for this body: [vot]

MPC data
Name (number) Helio (895)
a 3.20302
e 0.14263
i / sin(i) 26.0877 / 0.43975
q 2.74616
Q 3.65988
ω 176.9731
Node 264.5407
m 72.7027
n 0.1719
Epoch 2460800.5
nobs 5256
nopp 50
Years observed 1906-2025
rms 0.70
Best values
[raw, vot]

Value Standard error
Parent Euphrosyne (31)
 
ap 3.215
ep 0.176
sin(ip) 0.443
G 0.150
H 8.310
Mass 1.924e+18 6.477e+17
D 123.44 0.849
pV 0.042 0.0015
Value
Rotational Period 9.340
Period quality 3
Spectral Class B
Spectral Class Score 23.000
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
31 Euphrosyne 0 Euphrosyne Novakovic 2019EPSC...13.1671N HCM
31 Euphrosyne 901 Euphrosyne Nesvorny doi.org/10.26033/6cg5-pt13 HCM-2020-08-14
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.2146 0.1764 0.4427 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Mass data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
1.3677e+18 6.7695e+17 6.7695e+17 Fienga INPOP19a Ephem
2.5500e+18 Folkner 2014IPNPR.196C...1F Ephem
2.8000e+19 1.3700e+19 1.3700e+19 Zielenbach 2011AJ....142..120Z Deflec
6.8800e+18 1.3900e+19 1.3900e+19 Zielenbach 2011AJ....142..120Z Deflec
7.7500e+18 3.4300e+18 3.4300e+18 Zielenbach 2011AJ....142..120Z Deflec
8.2100e+18 3.4100e+18 3.4100e+18 Zielenbach 2011AJ....142..120Z Deflec
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
102.03 2.870 2.870 Masiero 2012ApJ...759L...8M NEATM
109.57 1.990 1.990 Masiero 2014ApJ...791..121M NEATM
112.40 nan nan Ali-Lagoa 2016A&A...591A..14A NEATM
119.32 1.549 1.549 Masiero 2011ApJ...741...68M NEATM
126.38 12.640 12.640 Ali-Lagoa 2018A&A...612A..85A NEATM
128.17 1.780 1.780 Usui 2011PASJ...63.1117U NEATM
138.43 13.840 13.840 Ali-Lagoa 2018A&A...612A..85A NEATM
141.90 3.500 3.500 Tedesco 2002AJ....123.1056T STM
144.74 40.810 40.810 Masiero 2020PSJ.....1....5M NEATM
150.93 2.526 2.526 Ryan&Woodward 2010AJ....140..933R IRAS-STM
155.12 7.646 7.646 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.035 0.0035 0.0035 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
0.037 0.0037 0.0037 Ryan&Woodward 2010AJ....140..933R IRAS-STM
0.038 0.0300 0.0300 Masiero 2020PSJ.....1....5M NEATM
0.042 0.0020 0.0020 Tedesco 2002AJ....123.1056T STM
0.046 0.0090 0.0090 Ali-Lagoa 2018A&A...612A..85A NEATM
0.055 0.0110 0.0110 Ali-Lagoa 2018A&A...612A..85A NEATM
0.059 0.0063 0.0063 Masiero 2011ApJ...741...68M NEATM
0.070 0.0200 0.0200 Masiero 2014ApJ...791..121M NEATM
0.089 0.0290 0.0290 Masiero 2012ApJ...759L...8M 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
8.31 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
27.792 2 Synodic Woo 2001ASPC..246..251W Lightcurve
9.347 3 Synodic Brines 2017MPBu...44..145B Lightcurve
9.391 3- Synodic Polakis 2016MPBu...43..310P Lightcurve
9.3939 2 Synodic Pal 2020ApJS..247...26P Lightcurve
9.394 2 Synodic Franco 2023MPBu...50...47F Lightcurve
9.3959 2 Synodic Behrend LCDB Lightcurve
9.67 2 Synodic Danforth 1994MPBu...21....4D Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
B Bus-DeMeo NIR Yang 2020A&A...643A..38Y SPEC
B Bus VIS Bus 2002Icar..158..146B SPEC
P 0.990000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC
X 1.000 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT