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19537 (1999 JL8)
Classification: Inner Main-belt Asteroid          SPK-ID: 2019537
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05950319725074906 1.1726e-08  
a 1.960723333169589 5.8125e-09 au
q 1.844054025921853 2.3385e-08 au
i 27.13967719776077 5.7298e-07 deg
node 83.16153303658474 2.1593e-06 deg
peri 297.211867898424 1.5644e-05 deg
M 172.1071529890518 1.6075e-05 deg
tp 2458721.076495414972
(2019-Aug-25.57649542)
4.5493e-05 TDB
period 1002.819805296465
2.75
4.4592e-06
1.221e-08
d
yr
n .3589877245130522 1.5963e-09 deg/d
Q 2.077392640417326 6.1583e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1721  
   data-arc span      11374 days (31.14 yr)  
   first obs. used      1990-01-23  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45149  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:57:19  

Additional Information
 Earth MOID = .906565 au 
 Jupiter MOID = 3.19075 au 
 T_jup = 3.744 
[ show covariance matrix ]

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 14.41   n/a E2021B10  
diameter diameter 3.408 km 0.080 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 50.1 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Warner, B.D. (2012) Minor Planet Bull. 39, 158-167.]
geometric albedo albedo 0.220   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19537 (1999 JL8)          Discovered 1999-May-12 by LINEAR at Socorro
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 JL8 = 1990 BU1 = 1997 YG6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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