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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 542 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7722007416510752 3.0457e-08  
a 1.833305533555498 4.6992e-09 au
q .4176256408709222 5.5558e-08 au
i 9.030543233952905 3.469e-06 deg
node 309.4920400580914 2.7386e-05 deg
peri 227.7858424931674 2.6443e-05 deg
M 130.7246392860272 2.7893e-06 deg
tp 2458671.265261828045
(2019-Jul-06.76526183)
6.5969e-06 TDB
period 906.6730372272875
2.48
3.486e-06
9.544e-09
d
yr
n .3970560336733099 1.5266e-09 deg/d
Q 3.248985426240073 8.3279e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3011  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      24431 days (66.89 yr)  
   first obs. used      1953-11-30  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39151  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-21 07:42:42  

Additional Information
 Earth MOID = .0584006 au 
 Jupiter MOID = 1.80206 au 
 T_jup = 3.583 
[ 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 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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