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140 Siwa
Classification: Main-belt Asteroid          SPK-ID: 2000140
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 130 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2157471961675951 3.2196e-08  
a 2.732825747999028 8.4376e-09 au
q 2.143226255253627 8.7175e-08 au
i 3.185997978228811 3.7458e-06 deg
node 107.2628159717002 5.8508e-05 deg
peri 196.7109346942594 5.8997e-05 deg
M 200.6737330800138 9.4731e-06 deg
tp 2458330.799860905889
(2018-Jul-31.29986091)
4.4651e-05 JED
period 1650.123077685317
4.52
7.6421e-06
2.092e-08
d
yr
n .2181655446604529 1.0104e-09 deg/d
Q 3.322425240744429 1.0258e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2530  
   data-arc span      50805 days (139.10 yr)  
   first obs. used      1877-03-11  
   last obs. used      2016-04-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55366  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:25:40  

Additional Information
 Earth MOID = 1.12782 au 
 Jupiter MOID = 1.9186 au 
 T_jup = 3.317 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.34 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
diameter diameter 109.79 km 3.0 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
rotation period rot_per 34.445 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Published Reference List:
[Pilcher, F. (2011) Minor Planet Bul. 38, 76-78.]
[Pilcher, F. (2012) Minor Planet Bul. 39, 134-135.]
geometric albedo albedo 0.0676   0.004 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
B-V BV .721 mag .028 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=2; phase (min.=5.40, mean=9.53, max.=13.67) deg.
U-B UB .299 mag .025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=2; phase (min.=5.40, mean=9.53, max.=13.67) deg.
Tholen spectral type spec_T P   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Xc   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

140 Siwa          Discovered 1874-Oct-13 by Palisa, J. at Pola
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1948 AL 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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