Hela

00699, 1902 WE, 1902WE, 1910 LC, 1910LC, 1923 TB, 1923TB, 1948 KD, 1948KD, 1957 WX1, 1957WX1, J02W00E, J10L00C, J23T00B, J48K00D, J57W01X

All data for this body: [vot]

MPC data
Name (number) Hela (699)
a 2.61303
e 0.40944
i / sin(i) 15.2934 / 0.26376
q 1.54314
Q 3.68292
ω 91.4760
Node 242.4951
m 30.9903
n 0.2333
Epoch 2460800.5
nobs 5993
nopp 38
Years observed 1902-2025
rms 0.59
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.613
ep 0.294
sin(ip) 0.321
G 0.150
H 11.440
Mass
D 13.67 0.408
pV 0.052 0.0087
Value
Rotational Period 3.396
Period quality 3
Spectral Class S
Spectral Class Score 37.830
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.6128 0.2945 0.3205 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
12.20 1.800 1.800 Ali-Lagoa 2017A&A...603A..55A NEATM
13.28 2.660 2.660 Ali-Lagoa 2018A&A...612A..85A NEATM
13.39 0.450 0.450 Usui 2011PASJ...63.1117U NEATM
14.16 1.420 1.420 Ali-Lagoa 2018A&A...612A..85A NEATM
26.30 3.900 3.900 Ali-Lagoa 2017A&A...603A..55A NEATM
31.50 4.700 4.700 Ali-Lagoa 2017A&A...603A..55A NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.040 0.0100 0.0100 Ali-Lagoa 2017A&A...603A..55A NEATM
0.050 0.0200 0.0200 Ali-Lagoa 2017A&A...603A..55A NEATM
0.240 0.0700 0.0700 Ali-Lagoa 2017A&A...603A..55A NEATM
0.284 0.0570 0.0570 Ali-Lagoa 2018A&A...612A..85A NEATM
0.323 0.1290 0.1290 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
11.44 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
2.634 2 Synodic Monson LCDB Lightcurve
3.3 3 Synodic Szabo 2001A&A...375..285S Lightcurve
3.396 3 Synodic Pilcher 2000MPBu...27...56P Lightcurve
3.396 3 Synodic Warner 2017MPBu...44...12W Lightcurve
3.39619 2 Synodic Pal 2020ApJS..247...26P Lightcurve
3.3962 3 Synodic Harris 1999Icar..142..173H Lightcurve
3.39623 2 Sidereal Durech 2023A&A...675A..24D Model
3.39624 3 Synodic Behrend LCDB Lightcurve
3.3973 2+ Synodic Behrend LCDB Lightcurve
3.4 3 Synodic Behrend LCDB Lightcurve
3.656 0 Synodic Pilcher 1983MPBu...10...18P Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
K DeMeo-Carry VIS Carry PHOT
K DeMeo-Carry VIS DeMeo 2013Icar..226..723D PHOT
S Bus-DeMeo VISNIR DeMeo 2009Icar..202..160D SPEC
S Tholen VIS Lazzaro 2004Icar..172..179L SPEC
S 0.870000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC
S Q 0.640000 0.360000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC
S S DeMeo-Carry VIS Choi 2023PSJ.....4...49C PHOT
S S None None Movis NIR Popescu 2018A&A...617A..12P PHOT
Sk Bus VIS Angeli 2002A&A...391..757A SPEC
Sk Bus VIS Lazzaro 2004Icar..172..179L SPEC
Sq Bus-DeMeo VISNIR Binzel 2019Icar..324...41B SPEC
Sq Bus VIS Bus 2002Icar..158..146B SPEC
Sq Bus VISNIR de Leon 2010A&A...517A..23D SPEC
XL 0.48 Bus VIS Carvano 2010A&A...510A..43C PHOT