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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 87 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3316427528214238 3.5423e-08  
a 2.777989908954644 6.4453e-09 AU
q 1.85668968823879 9.7477e-08 AU
i 14.87807422128731 5.4491e-06 deg
node 212.4614195310627 2.0937e-05 deg
peri 90.88163757528407 2.1464e-05 deg
M 45.39329966521769 7.0339e-06 deg
tp 2456787.252634331886
(2014-May-09.75263433)
3.2899e-05 JED
period 1691.197868555586
4.63
5.8857e-06
1.611e-08
d
yr
n .2128668718743525 7.4081e-10 deg/d
Q 3.699290129670499 8.5828e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      1276  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      40690 days (111.40 yr)  
   first obs. used      1903-09-21  
   last obs. used      2015-02-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .44044  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 13:28:21  

Additional Information
 Earth MOID = .914347 AU 
 T_jup = 3.205 
[ 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-May); 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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