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639 Latona (A907 OA)
Classification: Main-belt Asteroid          SPK-ID: 2000639
[ 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 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1070212348242773 3.8922e-08  
a 3.017226545590807 1.2684e-08 au
q 2.69431923493709 1.1725e-07 au
i 8.555647287920509 4.4463e-06 deg
node 279.8359979077237 2.7331e-05 deg
peri 70.65703379812898 3.3718e-05 deg
M 157.1789998654775 2.0762e-05 deg
tp 2458164.700076412338
(2018-Feb-15.20007641)		 0.00010967 TDB
period 1914.301355455085
5.24		 1.2071e-05
3.305e-08		 d
yr
n .1880581649143834 1.1858e-09 deg/d
Q 3.340133856244523 1.4041e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2942  
   data-arc span      41393 days (113.33 yr)  
   first obs. used      1907-07-20  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42853  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 19:34:33  

Additional Information
 Earth MOID = 1.70302 au 
 Jupiter MOID = 2.0782 au 
 T_jup = 3.222 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456438.5 (2013-May-26.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1025041271679603 3.8481e-08  
q 2.707883649470099 1.1515e-07 au
tp 2456238.212353496834
(2012-Nov-06.71235350)		 0.0001153 TDB
node 280.0488390483875 2.7192e-05 deg
peri 68.70617798156611 3.4361e-05 deg
i 8.577408640323364 4.454e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      2942  
   data-arc span      41393 days (113.33 yr)  
   first obs. used      1907-07-20  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42853  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 19:34:33  

Additional Information
 Jupiter MOID = 2.0782 au 
 T_jup = 3.222 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.48078061301094E-15 -4.409910918477111E-15 -5.262400967895112E-13 -3.119710697415645E-15 -1.185531340059604E-13 1.351663252450306E-15
q -4.409910918477111E-15 1.325991256398203E-14 1.648270722127142E-12 1.044001011499873E-14 3.666886616935479E-13 -3.860346716924657E-15
tp -5.262400967895112E-13 1.648270722127142E-12 1.329483291433684E-8 -7.672278538342038E-13 2.444137297775805E-9 -2.72801089110708E-13
node -3.119710697415645E-15 1.044001011499873E-14 -7.672278538342038E-13 7.393871904646888E-10 -7.306682048042023E-10 1.717263000754848E-11
peri -1.185531340059604E-13 3.666886616935479E-13 2.444137297775805E-9 -7.306682048042023E-10 1.180671139122373E-9 -1.701659928138011E-11
i 1.351663252450306E-15 -3.860346716924657E-15 -2.72801089110708E-13 1.717263000754848E-11 -1.701659928138011E-11 1.983781977325845E-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 8.3   n/a MPO502159 IRAS observations used: 15
diameter diameter 78.509 km 1.161 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 6.193 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Binzel, R.P. (1987) Icarus 72, 135-208.]
[Riccioli, D.; Blanco, C.; Cigna, M. (2001) Planet. Space Sci. 49, 657-671.]
[Warner, B.D. (2008) Minor Planet Bull. 35, 56-60.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.123   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.836   0.021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=7; phase (min.=3.31, mean=9.42, max.=16.89) deg.
U-B UB 0.477   0.015 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=6; phase (min.=5.44, mean=10.44, max.=16.89) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

639 Latona (A907 OA)          Discovered 1907-Jul-19 by Lohnert, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A907 OA = A913 UB 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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