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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 115 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3303781415330856 1.8401e-08  
a 2.78047259864697 4.9861e-09 au
q 1.861865228922315 5.0364e-08 au
i 14.8732025609906 7.2611e-07 deg
node 212.4276558465654 1.413e-06 deg
peri 90.75356979147909 2.3e-06 deg
M 153.6680428532805 2.1705e-06 deg
tp 2458477.634637151190
(2018-Dec-25.13463715)
8.7636e-06 TDB
period 1693.465510418688
4.64
4.5553e-06
1.247e-08
d
yr
n .2125818316258443 5.7183e-10 deg/d
Q 3.699079968371625 6.6335e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3017  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      42899 days (117.45 yr)  
   first obs. used      1903-09-21  
   last obs. used      2021-03-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .36555  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 11:07:06  

Additional Information
 Earth MOID = .916632 au 
 Jupiter MOID = 1.91496 au 
 T_jup = 3.205 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456946.5 (2014-Oct-16.0) TDB
Reference: JPL 115 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3316600725026632 1.8271e-08  
q 1.856723667113539 4.9944e-08 au
tp 2456787.264935215786
(2014-May-09.76493522)
6.5203e-06 TDB
node 212.4618035371092 1.4131e-06 deg
peri 90.88656339849696 2.3009e-06 deg
i 14.87778556586152 7.2648e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3017  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      42899 days (117.45 yr)  
   first obs. used      1903-09-21  
   last obs. used      2021-03-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .36555  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-16 11:07:06  

Additional Information
 Jupiter MOID = 1.91496 au 
 T_jup = 3.205 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.338393408217662E-16 -9.10679102066363E-16 6.48079162291504E-14 6.350026722210503E-15 -1.713131855791869E-14 -2.184798652466696E-15
q -9.10679102066363E-16 2.494452329279919E-15 -1.750497043035792E-13 -1.736963719079956E-14 4.75906434271801E-14 5.862068318807062E-15
tp 6.48079162291504E-14 -1.750497043035792E-13 4.251408436095994E-11 6.897549560673542E-13 5.409040595120591E-12 -1.812585242915979E-12
node 6.350026722210503E-15 -1.736963719079956E-14 6.897549560673542E-13 1.996947404641846E-12 -2.137318376216539E-12 -4.604186603545574E-13
peri -1.713131855791869E-14 4.75906434271801E-14 5.409040595120591E-12 -2.137318376216539E-12 5.294086611497239E-12 3.012199693429716E-13
i -2.184798652466696E-15 5.862068318807062E-15 -1.812585242915979E-12 -4.604186603545574E-13 3.012199693429716E-13 5.277728119559138E-13

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 8.41   n/a E2021B10 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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1918-Dec-31 02:41 < 00:01 Jupiter 1.88924227924695 1.88924208702197 1.88924247147237 2.34778150091227 2.14834782222271 2421958.611759514 0.780871892554399 124.908063157814 14.025553485013 77.8847039698417 8818747.89536418 T 115 CATAB v2.0f-lin.ifort 2021-Mar-16 11:08:17 2021-Mar-16 11:08
2002-Aug-16 13:05 < 00:01 Jupiter 1.95500469398943 1.9550045279432 1.9550048602277 0.954810646823346 0.212476478819171 2452503.044880291 0.137984174003674 8927.43510502917 365.433847327935 38.9459323579355 31361876.5571362 T 115 CATAB v2.0f-lin.ifort 2021-Mar-16 11:08:17 2021-Mar-16 11:08
2025-Feb-23 08:06 < 00:01 Jupiter 1.94004297111061 1.94004282866139 1.94004311355995 3.2974974512866 3.16232346451194 2460729.837729166 0.109380853316333 30.8120279088236 2.97792501375933 -81.5885026056135 12337923.355921 T 115 CATAB v2.0f-lin.ifort 2021-Mar-16 11:08:17 2021-Mar-16 11:08
2108-Sep-18 17:17 < 00:01 Jupiter 1.91017411230363 1.91017395238715 1.9101742722212 2.1828931720284 1.96930669856566 2491252.220132953 0.792902531021852 147.902214602547 12.5509255438263 78.5730669505559 8196738.05131049 T 115 CATAB v2.0f-lin.ifort 2021-Mar-16 11:08:17 2021-Mar-16 11:08
2192-May-11 05:31 00:02 Jupiter 1.94527932820103 1.94527905409902 1.94527960231637 0.67565691559881 n/a 2521802.730033405 1.67923373226413 344.201202012224 9.2209832110133 -88.3195856824434 31538164.4005645 F 115 CATAB v2.0f-lin.ifort 2021-Mar-16 11:08:17 2021-Mar-16 11:08

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