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35918 (1999 JL99)
Classification: Main-belt Asteroid          SPK-ID: 2035918
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2699941674656758 5.1134e-08  
a 2.786503495071582 1.6356e-08 au
q 2.034163803779534 1.4015e-07 au
i 18.47476753085576 4.0922e-06 deg
node 96.26227850335886 1.5185e-05 deg
peri 276.2759144710387 1.6386e-05 deg
M 128.285448367311 9.4158e-06 deg
tp 2458595.071709688416
(2019-Apr-21.57170969)
4.1238e-05 TDB
period 1698.978233978002
4.65
1.4959e-05
4.096e-08
d
yr
n .2118920612402979 1.8656e-09 deg/d
Q 3.53884318636363 2.0772e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1311  
   data-arc span      8391 days (22.97 yr)  
   first obs. used      1998-04-02  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49413  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 05:01:53  

Additional Information
 Earth MOID = 1.1293 au 
 Jupiter MOID = 2.29131 au 
 T_jup = 3.204 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457057.5 (2015-Feb-04.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2691301626164352 5.1045e-08  
q 2.036464218867078 1.3962e-07 au
tp 2456890.254723705019
(2014-Aug-20.75472370)
3.4726e-05 TDB
node 96.6715877554459 1.5198e-05 deg
peri 275.1310490308476 1.6427e-05 deg
i 18.46877546051379 4.0864e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1311  
   data-arc span      8391 days (22.97 yr)  
   first obs. used      1998-04-02  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49413  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 05:01:53  

Additional Information
 Jupiter MOID = 2.29131 au 
 T_jup = 3.204 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.605579877159433E-15 -7.102290588176102E-15 6.992161768757105E-13 -2.303834145000048E-14 9.345519411221493E-14 -5.691874822656154E-15
q -7.102290588176102E-15 1.94944683275771E-14 -1.831977225870471E-12 6.228714454071696E-14 -2.378801315678939E-13 1.602661683060161E-14
tp 6.992161768757105E-13 -1.831977225870471E-12 1.205889169117719E-9 -4.970314380758786E-12 2.508336290153067E-10 -4.339570697712542E-12
node -2.303834145000048E-14 6.228714454071696E-14 -4.970314380758786E-12 2.309759214722827E-10 -2.190924109468901E-10 -1.17547838283327E-11
peri 9.345519411221493E-14 -2.378801315678939E-13 2.508336290153067E-10 -2.190924109468901E-10 2.698605771256421E-10 1.036068312257015E-11
i -5.691874822656154E-15 1.602661683060161E-14 -4.339570697712542E-12 -1.17547838283327E-11 1.036068312257015E-11 1.669893863270735E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.82   n/a MPCxxxxx  
diameter diameter 4.469 km 0.979 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
geometric albedo albedo 0.308   0.155 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

35918 (1999 JL99)          Discovered 1999-May-12 by LINEAR at Socorro
Reference: 20020227/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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