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JPL Small-Body Database Browser
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59490 (1999 JD4)
Classification: Mars-crossing Asteroid          SPK-ID: 2059490
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .303229956669284 3.413e-08  
a 2.357233469961286 1.1952e-08 au
q 1.642449667005539 7.9126e-08 au
i 22.3706340131874 5.8678e-06 deg
node 236.4160149437688 1.1067e-05 deg
peri 76.91423034934932 1.5742e-05 deg
M 238.6145371465901 1.4041e-05 deg
tp 2459446.224496617547
(2021-Aug-19.72449662)
5.4079e-05 TDB
period 1321.911331145937
3.62
1.0054e-05
2.753e-08
d
yr
n .2723329405822731 2.0713e-09 deg/d
Q 3.072017272917032 1.5576e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1033  
   data-arc span      15035 days (41.16 yr)  
   first obs. used      1978-11-30  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46158  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 12:48:17  

Additional Information
 Earth MOID = .771754 au 
 Jupiter MOID = 2.5025 au 
 T_jup = 3.394 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3   n/a MPO400573  
diameter diameter 3.307 km 0.709 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
rotation period rot_per 18.8363 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2014) http://www.asu.cas.cz/~ppravec/neo.htm]
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.J.; Pravec, P.; Koehn, B.W. (2019) Minor Plantet Bull. 46, 238-265.]
geometric albedo albedo 0.298   0.147 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

59490 (1999 JD4)          Discovered 1999-May-10 by LINEAR at Socorro
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 JD4 = 1978 XH1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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