Helwerthia

00801, 1915 FH, 1915FH, 1924 OD, 1924OD, 1925 RG, 1925RG, 1970 GS1, 1970GS1, J15F00H, J24O00D, J25R00G, J70G01S

All data for this body: [vot]

MPC data
Name (number) Helwerthia (801)
a 2.60504
e 0.07671
i / sin(i) 14.1404 / 0.24430
q 2.40521
Q 2.80487
ω 337.4165
Node 185.9007
m 75.4188
n 0.2344
Epoch 2460800.5
nobs 6293
nopp 40
Years observed 1915-2025
rms 0.61
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.605
ep 0.125
sin(ip) 0.245
G 0.150
H 11.570
Mass
D 33.46 0.168
pV 0.034 0.0025
Value
Rotational Period 23.900
Period quality 3-
Spectral Class X
Spectral Class Score 15.727
Family data
[raw, vot]

Parent Parent name Family ID Family name Cj Author Reference Method
801 Helwerthia -1 Helwerthia -1.0000 Nesvorny 2024ApJS..274...25N HCM-2024
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.6053 0.1247 0.2449 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
30.92 8.730 8.730 Masiero 2020PSJ.....1....5M NEATM
31.28 2.539 2.539 Ryan&Woodward 2010AJ....140..933R IRAS-STM
31.72 11.002 11.002 Masiero 2017AJ....154..168M NEATM
31.95 3.190 3.190 Ali-Lagoa 2018A&A...612A..85A NEATM
31.99 13.590 13.590 Masiero 2021PSJ.....2..162M NEATM
32.35 10.280 10.280 Masiero 2020PSJ.....1....5M NEATM
32.40 0.680 0.680 Masiero 2012ApJ...759L...8M NEATM
32.65 9.180 9.180 Masiero 2021PSJ.....2..162M NEATM
33.23 2.500 2.500 Tedesco 2002AJ....123.1056T STM
33.31 0.190 0.190 Nugent 2016AJ....152...63N NEATM
33.54 13.008 13.008 Masiero 2017AJ....154..168M NEATM
33.65 10.280 10.280 Masiero 2021PSJ.....2..162M NEATM
34.23 11.260 11.260 Masiero 2020PSJ.....1....5M NEATM
34.68 0.450 0.450 Usui 2011PASJ...63.1117U NEATM
38.55 2.674 2.674 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
39.27 3.930 3.930 Ali-Lagoa 2018A&A...612A..85A NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.028 0.0120 0.0210 Masiero 2021PSJ.....2..162M NEATM
0.030 0.0042 0.0042 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
0.030 0.0060 0.0060 Ali-Lagoa 2018A&A...612A..85A NEATM
0.030 0.0120 0.0210 Masiero 2021PSJ.....2..162M NEATM
0.030 0.0150 0.0310 Masiero 2021PSJ.....2..162M NEATM
0.030 0.0320 0.0320 Masiero 2020PSJ.....1....5M NEATM
0.031 0.0120 0.0120 Masiero 2012ApJ...759L...8M NEATM
0.033 0.0240 0.0240 Masiero 2020PSJ.....1....5M NEATM
0.034 0.0290 0.0290 Masiero 2020PSJ.....1....5M NEATM
0.038 0.0070 0.0070 Tedesco 2002AJ....123.1056T STM
0.041 0.0284 0.0284 Masiero 2017AJ....154..168M NEATM
0.043 0.0254 0.0254 Masiero 2017AJ....154..168M NEATM
0.044 0.0072 0.0072 Ryan&Woodward 2010AJ....140..933R IRAS-STM
0.046 0.0090 0.0090 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
11.57 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
23.93 3- Synodic Pilcher 2012MPBu...39..222P Lightcurve
23.9648 2 Synodic Pal 2020ApJS..247...26P Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
X 1.000 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
X X 0.2335 0.5540 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
X X 0.5079 0.5540 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
X X 0.8798 0.5540 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT