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5143 Heracles (1991 VL)
Classification: Apollo [NEO]          SPK-ID: 2005143
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 544 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7722007419442016 3.0454e-08  
a 1.83330553345038 4.696e-09 au
q .4176256403095863 5.5551e-08 au
i 9.030543185564644 3.4657e-06 deg
node 309.492040924114 2.7357e-05 deg
peri 227.7858417717747 2.6415e-05 deg
M 130.7246393102714 2.7892e-06 deg
tp 2458671.265261795301
(2019-Jul-06.76526180)
6.5969e-06 TDB
period 906.673037149308
2.48
3.4837e-06
9.538e-09
d
yr
n .3970560337074591 1.5256e-09 deg/d
Q 3.248985426591175 8.3223e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3027  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      24435 days (66.90 yr)  
   first obs. used      1953-11-30  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39157  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-25 07:38:11  

Additional Information
 Earth MOID = .0584006 au 
 Jupiter MOID = 1.80206 au 
 T_jup = 3.583 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456647.5 (2013-Dec-21.0) TDB
Reference: JPL 544 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7722219292050165 3.046e-08  
q .4176129681712537 5.5578e-08 au
tp 2456857.349853872823
(2014-Jul-18.84985387)
8.3142e-06 TDB
node 309.5684972953248 2.7321e-05 deg
peri 227.705561318088 2.6378e-05 deg
i 9.035557023864312 3.4682e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3027  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      24435 days (66.90 yr)  
   first obs. used      1953-11-30  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39157  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-25 07:38:11  

Additional Information
 Jupiter MOID = 1.80206 au 
 T_jup = 3.583 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.278333040648296E-16 -1.692631191332566E-15 -1.738084101542174E-13 -2.514986710040949E-13 2.541686338533594E-13 -3.606636133628435E-14
q -1.692631191332566E-15 3.088900980183464E-15 3.129361612592689E-13 4.585983628510077E-13 -4.646815595678237E-13 6.542016821292721E-14
tp -1.738084101542174E-13 3.129361612592689E-13 6.912561498803384E-11 1.405625422892297E-10 -1.280704425950204E-10 2.040536497434354E-11
node -2.514986710040949E-13 4.585983628510077E-13 1.405625422892297E-10 7.46453056932135E-10 -7.162075393774959E-10 4.159552239123363E-11
peri 2.541686338533594E-13 -4.646815595678237E-13 -1.280704425950204E-10 -7.162075393774959E-10 6.957994755361507E-10 -3.78524683200115E-11
i -3.606636133628435E-14 6.542016821292721E-14 2.040536497434354E-11 4.159552239123363E-11 -3.78524683200115E-11 1.202846707707453E-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 14.0   n/a MPO395047  
diameter diameter 4.843 km 0.378 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  
rotation period rot_per 2.7063 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pilcher, F.; Briggs, J.W.; Franco, L.; Inasaridze, R.Y.; et al. (2012) Minor Planet Bull. 39, 148-151.]
[Polishook, D. (2012) Minor Planet Bull. 39, 187-192.]
[Linder, T.; Sampson, R.; Holmes, R. (2013) Minor Planet Bull. 40, 4-6.]
[Lozano, J.; Flores, A.; Mas, V.; Fornas, G.; et al. (2017) Minor Planet Bull. 44, 108-111.]
[Vaduvescu, O.; Aznar Macias, A.; Tudor, V.; Predatu, M.; et al. (2017) Earth, Moon, and Planets 120, 41-100.]
[Warner, B.D. (2017) Minor Planet Bull. 44, 22-36.]
[Warner, B.D. (2018) Minor Planet Bull. 45, 19-34.]
geometric albedo albedo 0.227   0.054 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  
SMASSII spectral type spec_B O   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)

5143 Heracles (1991 VL)          Discovered 1991-Nov-07 by Shoemaker, C. S. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1991 VL = 1962 PG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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