Chaka

01246, 1932 OA, 1932OA, J32O00A

All data for this body: [vot]

MPC data
Name (number) Chaka (1246)
a 2.62074
e 0.31007
i / sin(i) 15.9953 / 0.27556
q 1.80813
Q 3.43334
ω 54.7897
Node 290.4862
m 280.4846
n 0.2323
Epoch 2460800.5
nobs 7659
nopp 39
Years observed 1932-2025
rms 0.48
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.623
ep 0.239
sin(ip) 0.298
G 0.150
H 10.930
Mass
D 19.58 0.035
pV 0.228 0.0116
Value
Rotational Period 25.460
Period quality 3
Spectral Class S
Spectral Class Score 9.100
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.6229 0.2388 0.2985 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
16.34 2.176 2.176 Ryan&Woodward 2010AJ....140..933R IRAS-STM
17.63 0.500 0.500 Masiero 2014ApJ...791..121M NEATM
18.11 0.900 0.900 Tedesco 2002AJ....123.1056T STM
18.42 0.718 0.718 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
19.60 0.035 0.035 Masiero 2011ApJ...741...68M NEATM
20.84 1.390 1.390 Masiero 2012ApJ...759L...8M NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.195 0.0290 0.0290 Masiero 2012ApJ...759L...8M NEATM
0.204 0.0309 0.0309 Masiero 2011ApJ...741...68M NEATM
0.228 0.0178 0.0178 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
0.235 0.0260 0.0260 Tedesco 2002AJ....123.1056T STM
0.310 0.0500 0.0500 Masiero 2014ApJ...791..121M NEATM
0.315 0.0691 0.0691 Ryan&Woodward 2010AJ....140..933R IRAS-STM
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
10.93 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
20.0 2 Synodic Florczak 1997P&SS...45.1423F Lightcurve
25.43 3 Synodic Behrend LCDB Lightcurve
25.44 2 Synodic Ferrero 2014MPBu...41..184F Lightcurve
25.462 2 Sidereal Durech 2023A&A...675A..24D Model
25.462 3 Synodic Garlitz LCDB Lightcurve
25.4649 2 Sidereal Durech 2020A&A...643A..59D Model
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
A Tholen VIS Lazzaro 2004Icar..172..179L SPEC
S 1.000 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
S L 0.620000 0.380000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC
SI Bus VIS Lazzaro 2004Icar..172..179L SPEC