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19594 (1999 NL31)
Classification: Main-belt Asteroid          SPK-ID: 2019594
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2127360032389255 3.0954e-08  
a 2.308898031707594 5.4796e-09 au
q 1.817712292555898 7.1864e-08 au
i 6.141194820307022 3.7506e-06 deg
node 314.2959592074552 2.7505e-05 deg
peri 309.431004808365 2.8783e-05 deg
M 114.6800549677295 7.374e-06 deg
tp 2458988.283129648905
(2020-May-18.78312965)
2.6064e-05 TDB
period 1281.461483147593
3.51
4.5619e-06
1.249e-08
d
yr
n .2809292395708602 1.0001e-09 deg/d
Q 2.800083770859289 6.6453e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1776  
   data-arc span      10403 days (28.48 yr)  
   first obs. used      1992-07-27  
   last obs. used      2021-01-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47206  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:59:07  

Additional Information
 Earth MOID = .80936 au 
 Jupiter MOID = 2.31493 au 
 T_jup = 3.548 
[ 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 14.40   n/a E2021B10  
diameter diameter 7.334 km 0.083 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 11.831 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.050   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19594 (1999 NL31)          Discovered 1999-Jul-14 by LINEAR at Socorro
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 NL31 = 1992 OP9 = 1996 VT31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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