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393 Lampetia (1894 BG)
Classification: Main-belt Asteroid          SPK-ID: 2000393
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 91 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3315367988670112 3.5354e-08  
a 2.777345440183557 6.369e-09 au
q 1.85655322359721 9.724e-08 au
i 14.87910085741987 5.3367e-06 deg
node 212.4629301784978 2.0691e-05 deg
peri 90.83988899012567 2.1194e-05 deg
M 130.6192850274619 7.0666e-06 deg
tp 2456787.093917793959
(2014-May-09.59391779)
3.2706e-05 JED
period 1690.60938855811
4.63
5.8153e-06
1.592e-08
d
yr
n .2129409681718598 7.3247e-10 deg/d
Q 3.698137656769903 8.4805e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1316  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      40996 days (112.24 yr)  
   first obs. used      1903-09-21  
   last obs. used      2015-12-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .4463  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:32:54  

Additional Information
 Earth MOID = .9117 au 
 Jupiter MOID = 1.90858 au 
 T_jup = 3.206 
[ 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 8.39 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 7
diameter diameter 96.89 km 31.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 7
rotation period rot_per 38.7 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:
[Scaltriti, F.; Zappala, V.; Schober, H.J. (1979) Icarus 37, 133-141.]
[Holliday, B. (2001) Minor Planet Bul. 28, 26-28.]
geometric albedo albedo 0.0829   0.099 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 7
B-V BV .740 mag .026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=14.24, mean=16.70, max.=20.76) deg.
U-B UB .324 mag .039 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=2; phase (min.=14.24, mean=14.67, max.=15.10) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices
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)

393 Lampetia (1894 BG)          Discovered 1894-Nov-04 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1894 BG = A907 GR 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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