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JPL Small-Body Database Browser
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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1070212357517711 3.8951e-08  
a 3.017226544975299 1.2769e-08 au
q 2.694319231588995 1.1739e-07 au
i 8.555647247429379 4.4887e-06 deg
node 279.8359980800491 2.7456e-05 deg
peri 70.65703468142725 3.3927e-05 deg
M 157.178999091269 2.0862e-05 deg
tp 2458164.700080784947
(2018-Feb-15.20008078)		 0.00011027 TDB
period 1914.301354869315
5.24		 1.2152e-05
3.327e-08		 d
yr
n .1880581649719286 1.1938e-09 deg/d
Q 3.340133858361602 1.4136e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2835  
   data-arc span      41191 days (112.77 yr)  
   first obs. used      1907-07-20  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43525  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:09:36  

Additional Information
 Earth MOID = 1.70302 au 
 Jupiter MOID = 2.0782 au 
 T_jup = 3.222 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456363.5 (2013-Mar-12.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .10245786433763 3.8496e-08  
q 2.707766188733066 1.1528e-07 au
tp 2456237.992058833222
(2012-Nov-06.49205883)		 0.00011622 TDB
node 280.0498007186989 2.7318e-05 deg
peri 68.65420226184828 3.4596e-05 deg
i 8.577363530209229 4.4965e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      2835  
   data-arc span      41191 days (112.77 yr)  
   first obs. used      1907-07-20  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43525  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:09:36  

Additional Information
 Jupiter MOID = 2.0782 au 
 T_jup = 3.222 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.481929872722179E-15 -4.416258040856133E-15 -5.101176495389246E-13 -2.960305899315531E-15 -1.154127966440204E-13 1.332567601690105E-15
q -4.416258040856133E-15 1.328917495724115E-14 1.592851521064594E-12 1.004337615824631E-14 3.552906098865739E-13 -3.777101730301119E-15
tp -5.101176495389246E-13 1.592851521064594E-12 1.350723446808949E-8 -1.089995468960841E-12 2.489192489340746E-9 -1.88264870762701E-13
node -2.960305899315531E-15 1.004337615824631E-14 -1.089995468960841E-12 7.462730710218779E-10 -7.375308923604805E-10 1.559526064648794E-11
peri -1.154127966440204E-13 3.552906098865739E-13 2.489192489340746E-9 -7.375308923604805E-10 1.196916783443203E-9 -1.544181145201409E-11
i 1.332567601690105E-15 -3.777101730301119E-15 -1.88264870762701E-13 1.559526064648794E-11 -1.544181145201409E-11 2.021866387058227E-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. 2019-August); 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

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