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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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 112 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3304379688616159 2.9341e-08  
a 2.780070050578016 5.383e-09 au
q 1.861429349772007 8.1104e-08 au
i 14.87475292513003 4.4314e-06 deg
node 212.4398770996085 1.5886e-05 deg
peri 90.71191537545597 1.6648e-05 deg
M 111.1928861390538 7.1981e-06 deg
tp 2458477.554370409438
(2018-Dec-25.05437041)		 3.3118e-05 TDB
period 1693.097761822377
4.64		 4.9175e-06
1.346e-08		 d
yr
n .2126280053743097 6.1756e-10 deg/d
Q 3.698710751384026 7.1618e-09 au
   Orbit Determination Parameters
   # obs. used (total)      2788  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      42782 days (117.13 yr)  
   first obs. used      1903-09-21  
   last obs. used      2020-11-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37777  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:53:13  

Additional Information
 Earth MOID = .917918 au 
 Jupiter MOID = 1.91549 au 
 T_jup = 3.205 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456286.5 (2012-Dec-25.0) TDB
Reference: JPL 112 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .331730208964347 2.9097e-08  
q 1.856003947436636 8.0335e-08 au
tp 2456787.422928051299
(2014-May-09.92292805)		 3.1153e-05 TDB
node 212.4663654332116 1.5889e-05 deg
peri 90.96448602249824 1.6654e-05 deg
i 14.87971212877385 4.433e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      2788  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      42782 days (117.13 yr)  
   first obs. used      1903-09-21  
   last obs. used      2020-11-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37777  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:53:13  

Additional Information
 Jupiter MOID = 1.91549 au 
 T_jup = 3.205 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.466305825744154E-16 -2.33527480584438E-15 -1.51427937342941E-13 3.602684028825995E-14 -8.690586691917036E-14 1.450231877189049E-14
q -2.33527480584438E-15 6.453772737510826E-15 4.521506032926729E-13 -9.900610164427821E-14 2.438446206019789E-13 -4.095274651754059E-14
tp -1.51427937342941E-13 4.521506032926729E-13 9.704955715326799E-10 2.735462240263775E-11 1.745601237200231E-10 6.328174626853622E-12
node 3.602684028825995E-14 -9.900610164427821E-14 2.735462240263775E-11 2.524693533570729E-10 -2.383641697494147E-10 6.070608089593861E-12
peri -8.690586691917036E-14 2.438446206019789E-13 1.745601237200231E-10 -2.383641697494147E-10 2.77344880694884E-10 -4.763906860075977E-12
i 1.450231877189049E-14 -4.095274651754059E-14 6.328174626853622E-12 6.070608089593861E-12 -4.763906860075977E-12 1.96513563218595E-11

[ 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] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
rotation period rot_per 38.455 h n/a LCDB (Rev. 2020-October); 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] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
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

[ show close-approach data ]
Alternate Designations
 A894 VC = A907 GR 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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