Siwa

00140, 1874 TB, 1874TB, 1948 AL, 1948AL, I74T00B, J48A00L

All data for this body: [vot]

MPC data
Name (number) Siwa (140)
a 2.73199
e 0.21732
i / sin(i) 3.1910 / 0.05566
q 2.13826
Q 3.32572
ω 197.1503
Node 107.0740
m 177.6594
n 0.2183
Epoch 2460800.5
nobs 6294
nopp 63
Years observed 1877-2025
rms 0.71
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.732
ep 0.201
sin(ip) 0.034
G 0.150
H 8.450
Mass 2.266e+18 6.186e+17
D 111.41 1.276
pV 0.064 0.0023
Value
Rotational Period 34.440
Period quality 3
Spectral Class Xc
Spectral Class Score 52.000
Family data
[raw, vot]

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

ap ep sin(ip) Author Reference Method
2.7323 0.2010 0.0342 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Mass data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
2.1100e+18 Folkner 2014IPNPR.196C...1F Ephem
2.4214e+18 8.7478e+17 8.7478e+17 Fienga INPOP19a Ephem
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
103.98 26.740 26.740 Masiero 2020PSJ.....1....5M NEATM
108.34 10.830 10.830 Ali-Lagoa 2018A&A...612A..85A NEATM
109.79 3.000 3.000 Tedesco 2002AJ....123.1056T STM
109.88 10.990 10.990 Ali-Lagoa 2018A&A...612A..85A NEATM
110.61 1.670 1.670 Usui 2011PASJ...63.1117U NEATM
111.38 33.940 33.940 Masiero 2020PSJ.....1....5M NEATM
113.42 40.010 40.010 Nugent 2016AJ....152...63N NEATM
115.18 3.263 3.263 Ryan&Woodward 2010AJ....140..933R IRAS-STM
117.36 5.780 5.780 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
94.72 30.920 30.920 Nugent 2016AJ....152...63N NEATM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.059 0.0059 0.0059 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
0.061 0.0035 0.0035 Ryan&Woodward 2010AJ....140..933R IRAS-STM
0.068 0.0040 0.0040 Tedesco 2002AJ....123.1056T STM
0.068 0.0140 0.0140 Ali-Lagoa 2018A&A...612A..85A NEATM
0.070 0.0140 0.0140 Ali-Lagoa 2018A&A...612A..85A NEATM
0.070 0.0490 0.0490 Masiero 2020PSJ.....1....5M NEATM
0.070 0.0600 0.0600 Nugent 2016AJ....152...63N NEATM
0.074 0.0440 0.0440 Masiero 2020PSJ.....1....5M NEATM
0.090 0.0600 0.0600 Nugent 2016AJ....152...63N 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
8.45 MPC-2023-12-04 MPC-2023-12-04 Phot
Periods
[raw, vot]

Value Quality Side real or Synodic Author Reference Method
10.0 1+ Synodic Behrend LCDB Lightcurve
11.38834 2 Sidereal Durech 2011Icar..214..652D Model
12.0 1 Synodic Behrend LCDB Lightcurve
17.16 2 Synodic Behrend LCDB Lightcurve
18.495 2 Synodic Le Bras 2001A&A...379..660L Lightcurve
18.5 1 Synodic Lagerkvist 1992A&AS...95..461L Lightcurve
18.917 1 Synodic Riccioli 2001P&SS...49..657R Lightcurve
18.917 1 Synodic Riccioli 2001P&SS...49..657R Lightcurve
22.0 1 Synodic Harris 1980Icar...43...20H Lightcurve
34.362 3 Synodic Pilcher 2012MPBu...39..134P Lightcurve
34.407 3- Synodic Pilcher 2011MPBu...38...76P Lightcurve
34.445 3 Synodic Pilcher 2012MPBu...39..134P Lightcurve
Spectral Class Data
[raw, vot]

Class 1 Class 2 Probability of Class 1 Probability of Class 2 Taxonomy Wavelength Author Reference Method
C Tholen VIS Lazzaro 2004Icar..172..179L SPEC
Cb Bus VIS Lazzaro 2004Icar..172..179L SPEC
P Tholen VIS Fornasier 2014Icar..233..163F SPEC
P C 0.550000 0.440000 Mahlke VISNIR Mahlke 2022A&A...665A..26M SPEC
P M 0.880000 0.120000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC
S 0.890000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC
S A 0.630000 0.250000 Mahlke VIS Mahlke 2022A&A...665A..26M SPEC
Sc Bus-DeMeo VISNIR Ostrowski 2011Icar..212..682O SPEC
X DeMeo-Carry VIS Choi 2023PSJ.....4...49C PHOT
X 1.000 Bus-Demeo VIS Sergeyev 2022A&A...658A.109S PHOT
Xc Bus-DeMeo VISNIR Hasegawa 2017PASJ...69...99H SPEC
Xc Bus-DeMeo VISNIR Hasegawa 2024AJ....167..224H SPEC
Xc Bus VIS Bus 2002Icar..158..146B SPEC
Xc Bus VIS Fornasier 2014Icar..233..163F SPEC