Roberthelm

1998 RN40, 1998RN40, 1999 XA159, 1999XA159, 25539, J98R40N, J99XF9A

All data for this body: [vot]

MPC data
Name (number) Roberthelm (25539)
a 2.69794
e 0.03434
i / sin(i) 6.1930 / 0.10788
q 2.60529
Q 2.79058
ω 40.4842
Node 114.2935
m 198.7692
n 0.2224
Epoch 2460800.5
nobs 1573
nopp 21
Years observed 1993-2025
rms 0.79
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.699
ep 0.073
sin(ip) 0.091
G 0.150
H 14.980
Mass
D 5.10 0.290
pV 0.098 0.0138
Value
Rotational Period
Period quality None
Spectral Class V
Spectral Class Score 0.877
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.6988 0.0728 0.0915 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
5.10 0.290 0.290 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.098 0.0138 0.0138 Masiero 2011ApJ...741...68M 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
14.98 MPC-2023-12-04 MPC-2023-12-04 Phot
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
V V 0.1462 0.1462 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT