Helffrich

02290, 1932CD1, 1953FR, 1976QR1, 1980RF, J32C01D, J53F00R, J76Q01R, J80R00F

All data for this body: [vot]

MPC data
Name (number) Helffrich (2290)
Packed designation 02290
a 2.59229
e 0.23365
i / sin(i) 11.5542 / 0.20030
q 1.98661
Q 3.19796
ω 270.5086
Node 155.8881
m 267.7675
n 0.2361
Epoch 2459600.5
nobs 2788
nopp 25
Years observed 1932-2021
rms 0.54
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.591
ep 0.219
sin(ip) 0.202
Value Standard error
G 0.150
H 12.570
Mass
D 18.26 0.345
pV 0.050 0.0067
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.5912 0.2187 0.2021 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Jan-2022
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
16.11 3.400 3.400 Masiero 2020PSJ.....1....5M NEATM
17.64 5.160 5.160 Masiero 2021PSJ.....2..162M NEATM
18.20 0.360 0.360 Usui 2011PASJ...63.1117U NEATM
18.77 1.880 1.880 Ali-Lagoa 2018A&A...612A..85A NEATM
19.32 5.790 5.790 Masiero 2021PSJ.....2..162M NEATM
20.01 2.000 2.000 Ali-Lagoa 2018A&A...612A..85A NEATM
21.05 7.700 7.700 Masiero 2012ApJ...759L...8M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.035 0.0300 0.0300 Masiero 2012ApJ...759L...8M NEATM
0.046 0.0240 0.0500 Masiero 2021PSJ.....2..162M NEATM
0.048 0.0100 0.0100 Ali-Lagoa 2018A&A...612A..85A NEATM
0.054 0.0110 0.0110 Ali-Lagoa 2018A&A...612A..85A NEATM
0.055 0.0270 0.0270 Masiero 2020PSJ.....1....5M NEATM
0.055 0.0240 0.0440 Masiero 2021PSJ.....2..162M NEATM
G data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.15 MPC-2022-01-18 MPC-2022-01-18 Phot
H data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
12.57 MPC-2022-01-18 MPC-2022-01-18 Phot