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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 555 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7723121163459374 1.259e-08  
a 1.83316116269971 3.9758e-09 au
q .4173885855319177 2.3178e-08 au
i 9.030995286363058 5.2357e-07 deg
node 309.4949321489798 2.5188e-06 deg
peri 227.7763885120145 2.6249e-06 deg
M 210.1716827324136 1.9232e-06 deg
tp 2459577.803470242597
(2021-Dec-29.30347024)
6.0127e-06 TDB
period 906.5659400335538
2.48
2.9493e-06
8.075e-09
d
yr
n .3971029398994139 1.2919e-09 deg/d
Q 3.248933739867503 7.0464e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3096  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      24541 days (67.19 yr)  
   first obs. used      1953-11-30  
   last obs. used      2021-02-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39584  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 17:11:43  

Additional Information
 Earth MOID = .0581784 au 
 Jupiter MOID = 1.80117 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 13.94   n/a E2021B10  
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. 2020-October); 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, A.M.; 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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