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1108 Demeter (1929 KA)
Classification: Main-belt Asteroid          SPK-ID: 2001108
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2564975127064953 4.3706e-08  
a 2.427599271056913 1.1179e-08 au
q 1.804926096182714 1.0692e-07 au
i 24.91339067414692 6.6909e-06 deg
node 234.2576457201868 1.2854e-05 deg
peri 78.11898673671625 1.9039e-05 deg
M 291.1134483341744 1.6458e-05 deg
tp 2457664.860076596625
(2016-Oct-03.36007660)
6.4524e-05 JED
period 1381.541465981064
3.78
9.5427e-06
2.613e-08
d
yr
n .2605784979058561 1.7999e-09 deg/d
Q 3.050272445931112 1.4046e-08 au
  Orbit Determination Parameters
   # obs. used (total)      937  
   data-arc span      31384 days (85.92 yr)  
   first obs. used      1929-05-31  
   last obs. used      2015-05-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48267  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 15:33:03  

Additional Information
 Earth MOID = .944558 au 
 Jupiter MOID = 2.47568 au 
 T_jup = 3.341 
[ 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 11.91 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 4
diameter diameter 25.61 km 2.0 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 4
rotation period rot_per 9.70 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Stephens, R.D. (2002) Minor Planet Bul. 29, 2-3.]
geometric albedo albedo 0.0464   0.008 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 4
B-V BV .681 mag .029 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=1; phase=17.46 deg.
U-B UB .308 mag .047 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=1; phase=17.46 deg.
Tholen spectral type spec_T CX   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

1108 Demeter (1929 KA)          Discovered 1929-May-31 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1929 KA = 1963 MF 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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