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17923 (1999 GY16)
Classification: Main-belt Asteroid          SPK-ID: 2017923
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0733868298775817 4.089e-08  
a 2.426953349351547 9.2886e-09 au
q 2.248846936781858 9.8389e-08 au
i 6.986531034087148 4.2659e-06 deg
node 135.396474751664 2.6919e-05 deg
peri 21.42009546670543 3.5487e-05 deg
M 240.1108842837729 2.4802e-05 deg
tp 2459460.404676513231
(2021-Sep-02.90467651)
9.6264e-05 TDB
period 1380.990113703489
3.78
7.9281e-06
2.171e-08
d
yr
n .2606825323568502 1.4966e-09 deg/d
Q 2.605059761921237 9.9703e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1749  
   data-arc span      10567 days (28.93 yr)  
   first obs. used      1991-01-15  
   last obs. used      2019-12-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51431  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:15:12  

Additional Information
 Earth MOID = 1.26039 au 
 Jupiter MOID = 2.37863 au 
 T_jup = 3.496 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456960.5 (2014-Oct-30.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07237102677680013 4.0941e-08  
q 2.251572908448483 9.8381e-08 au
tp 2456696.907880353048
(2014-Feb-08.40788035)
9.1699e-05 TDB
node 135.4614152552433 2.6934e-05 deg
peri 21.20457204926716 3.5689e-05 deg
i 6.984198916502834 4.2649e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1749  
   data-arc span      10567 days (28.93 yr)  
   first obs. used      1991-01-15  
   last obs. used      2019-12-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51431  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:15:12  

Additional Information
 Jupiter MOID = 2.37863 au 
 T_jup = 3.496 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.676146404159751E-15 -4.012531501301043E-15 1.407271832984021E-13 8.809497976623413E-15 1.276329943597253E-15 -4.376608759355115E-16
q -4.012531501301043E-15 9.678887991107364E-15 -1.165372619092223E-13 -2.098031510982707E-14 5.541970172232165E-14 1.186351209518998E-15
tp 1.407271832984021E-13 -1.165372619092223E-13 8.408779567624904E-9 -5.095479529505377E-13 2.154912909250007E-9 9.370681516145472E-13
node 8.809497976623413E-15 -2.098031510982707E-14 -5.095479529505377E-13 7.254201165126414E-10 -7.198135404201661E-10 1.7223623182416E-11
peri 1.276329943597253E-15 5.541970172232165E-14 2.154912909250007E-9 -7.198135404201661E-10 1.273737692984974E-9 -1.687054353953765E-11
i -4.376608759355115E-16 1.186351209518998E-15 9.370681516145472E-13 1.7223623182416E-11 -1.687054353953765E-11 1.818924285847943E-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 14.0   n/a MPO502305  
diameter diameter 3.568 km 0.168 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 20. h n/a LCDB (Rev. 2019-August); Warner et al., 2009 lower-limit; Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Polishook, D.; Ofek, E.O.; Waszczak, A.; Kulkarni, S.R.; et al. (2012). Mon. Not. Royal Ast. Soc. 421, 2094-2108.]
geometric albedo albedo 0.459   0.118 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17923 (1999 GY16)          Discovered 1999-Apr-15 by LINEAR at Socorro
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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