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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 557 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7724232088452887 1.2583e-08  
a 1.833146737415745 3.9611e-09 au
q .4171816522168033 2.3167e-08 au
i 9.030843940537675 5.234e-07 deg
node 309.4927909710974 2.5194e-06 deg
peri 227.7790960536408 2.6248e-06 deg
M 288.0228618022983 2.1617e-06 deg
tp 2459577.753477063858
(2021-Dec-29.25347706)
6.007e-06 TDB
period 906.5552393005868
2.48
2.9383e-06
8.045e-09
d
yr
n .3971076271951638 1.2871e-09 deg/d
Q 3.249111822614686 7.0207e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3100  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      24700 days (67.62 yr)  
   first obs. used      1953-11-30  
   last obs. used      2021-07-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39582  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-17 05:52:10  

Additional Information
 Earth MOID = .0582732 au 
 Jupiter MOID = 1.80029 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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