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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2561694980919191 4.3782e-08  
a 2.428823403654478 1.1212e-08 AU
q 1.806632931386404 1.0712e-07 AU
i 24.90446435019504 6.9398e-06 deg
node 234.3296741000842 1.287e-05 deg
peri 77.94307114936453 1.9354e-05 deg
M 187.0488488837765 1.6115e-05 deg
tp 2457664.722054383642
(2016-Oct-03.22205438)
6.5276e-05 JED
period 1382.58657450289
3.79
9.5737e-06
2.621e-08
d
yr
n .2603815244838741 1.803e-09 deg/d
Q 3.051013875922552 1.4084e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      878  
   data-arc span      30946 days (84.73 yr)  
   first obs. used      1929-05-31  
   last obs. used      2014-02-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49259  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 11:57:53  

Additional Information
 Earth MOID = .947894 AU 
 T_jup = 3.340 
[ 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 Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) 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 (024)
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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