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806 Gyldenia (A915 HE)
Classification: Outer Main-belt Asteroid          SPK-ID: 2000806
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07731796541295939 3.9323e-08  
a 3.214292399222694 1.5792e-08 au
q 2.965769850672456 1.2478e-07 au
i 14.20151676597684 4.1643e-06 deg
node 43.83362690559759 1.7163e-05 deg
peri 121.2671550496439 3.1219e-05 deg
M 124.3860642914414 2.6658e-05 deg
tp 2458273.229914000463
(2018-Jun-03.72991400)
0.00015549 TDB
period 2104.875915571904
5.76
1.5512e-05
4.247e-08
d
yr
n .1710314595443439 1.2605e-09 deg/d
Q 3.462814947772933 1.7013e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2544  
   data-arc span      38564 days (105.58 yr)  
   first obs. used      1915-04-18  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .3674  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:56:17  

Additional Information
 Earth MOID = 1.99797 au 
 Jupiter MOID = 1.57742 au 
 T_jup = 3.138 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456891.5 (2014-Aug-22.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07501000717804911 3.9083e-08  
q 2.969745513999244 1.2308e-07 au
tp 2456160.116922652138
(2012-Aug-20.61692265)
0.00015997 TDB
node 44.00779147508833 1.7105e-05 deg
peri 118.9910048139521 3.2128e-05 deg
i 14.23670528393572 4.1702e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2544  
   data-arc span      38564 days (105.58 yr)  
   first obs. used      1915-04-18  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .3674  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:56:17  

Additional Information
 Jupiter MOID = 1.57742 au 
 T_jup = 3.138 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.527517901481372E-15 -4.780004127528857E-15 8.313071430569379E-14 -6.357496743830949E-16 1.271398802360722E-14 6.721199433548379E-16
q -4.780004127528857E-15 1.51496503355643E-14 -1.682629364796712E-13 7.846219635575579E-15 -1.965731693324415E-14 -4.580296083995296E-16
tp 8.313071430569379E-14 -1.682629364796712E-13 2.558955858610722E-8 -2.827196775024887E-12 4.380330941318995E-9 -8.152688452104042E-12
node -6.357496743830949E-16 7.846219635575579E-15 -2.827196775024887E-12 2.925819258283154E-10 -2.830167832834519E-10 -2.156380186431154E-12
peri 1.271398802360722E-14 -1.965731693324415E-14 4.380330941318995E-9 -2.830167832834519E-10 1.032212323260204E-9 9.819267051364349E-13
i 6.721199433548379E-16 -4.580296083995296E-16 -8.152688452104042E-12 -2.156380186431154E-12 9.819267051364349E-13 1.739095876899479E-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 10.2   n/a MPO452169  
diameter diameter 83.103 km 0.741 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 16.852 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Alkema, M.S. (2013) Minor Planet Bull. 40, 215-216.]
[Marciniak, A.; Pilcher, F.; Oszkiewicz, D.; Santana-Ros, T.; et al. (2015) Planet. Space Sci. 118, 256-266.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.023   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

806 Gyldenia (A915 HE)          Discovered 1915-Apr-18 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A915 HE = 1950 LT 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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