Howell

15091, 1996 TT55, 1996TT55, 1997 WE22, 1997WE22, 1999 CM136, 1999CM136, J96T55T, J97W22E, J99CD6M

All data for this body: [vot]

MPC data
Name (number) Howell (15091)
a 3.22906
e 0.07474
i / sin(i) 7.2717 / 0.12657
q 2.98771
Q 3.47040
ω 311.9857
Node 305.0540
m 65.7010
n 0.1699
Epoch 2460800.5
nobs 1568
nopp 25
Years observed 1996-2025
rms 0.76
Best values
[raw, vot]

Value Standard error
Parent
 
ap 3.235
ep 0.059
sin(ip) 0.146
G 0.150
H 13.970
Mass
D 8.84 0.265
pV 0.082 0.0133
Value
Rotational Period 10.863
Period quality 2
Spectral Class X
Spectral Class Score 6.782
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
3.2354 0.0588 0.1456 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
8.84 0.265 0.265 Masiero 2011ApJ...741...68M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.082 0.0133 0.0133 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
13.97 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
10.86318 2 Sidereal Durech 2018A&A...617A..57D Model
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
C 0.77 Bus VIS Carvano 2010A&A...510A..43C PHOT
X X 0.2605 0.3940 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
X X 0.3385 0.3940 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT
X X 0.5314 0.3940 Bus-Demeo VIS Sergeyev 2021A&A...652A..59S PHOT