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JPL Small-Body Database Browser
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393 Lampetia (A894 VC)
Classification: Main-belt Asteroid          SPK-ID: 2000393
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 109 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3304379686457712 2.953e-08  
a 2.780070050665675 5.3944e-09 au
q 1.861429350430763 8.1654e-08 au
i 14.87475271760316 4.573e-06 deg
node 212.4398770968176 1.6149e-05 deg
peri 90.71191518042033 1.6934e-05 deg
M 111.1928861907899 7.244e-06 deg
tp 2458477.554370141387
3.3341e-05 TDB
period 1693.097761902455
n .212628005364253 6.1887e-10 deg/d
Q 3.698710750900588 7.177e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2555  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      42505 days (116.37 yr)  
   first obs. used      1903-09-21  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39065  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:26:22  

Additional Information
 Earth MOID = .917918 au 
 Jupiter MOID = 1.91549 au 
 T_jup = 3.205 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.4   n/a MPO502156 IRAS observations used: 7
diameter diameter 116.191 km 27.770 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 38.455 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Scaltriti, F.; Zappala, V.; Schober, H.J. (1979) Icarus 37, 133-141.]
[Holliday, B. (2001) Minor Planet Bull. 28, 26-28.]
[Pilcher, F.; Marciniak, A.; Oey, J. (2017) Minor Planet Bull. 44, 238.]
geometric albedo albedo 0.022   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.740   0.026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=14.24, mean=16.70, max.=20.76) deg.
U-B UB 0.324   0.039 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #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 (A894 VC)          Discovered 1894-Nov-04 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A894 VC = A907 GR 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2020-May-25 11:59 UT
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