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16943 (1998 HP42)
Classification: Main-belt Asteroid          SPK-ID: 2016943
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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .176118902444047 1.5848e-08  
a 2.599026481459642 1.0169e-08 au
q 2.141288790121957 4.4902e-08 au
i 14.1875478824284 1.122e-06 deg
node 69.57575901613178 3.576e-06 deg
peri 338.8622734922683 7.6709e-06 deg
M 287.1339855214139 1.0765e-05 deg
tp 2459510.268318766089
(2021-Oct-22.76831877)
4.6915e-05 TDB
period 1530.433571175552
4.19
8.9822e-06
2.459e-08
d
yr
n .2352274589242562 1.3806e-09 deg/d
Q 3.056764172797328 1.196e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1908  
   data-arc span      22674 days (62.08 yr)  
   first obs. used      1958-10-13  
   last obs. used      2020-11-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4053  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:47:40  

Additional Information
 Earth MOID = 1.15744 au 
 Jupiter MOID = 2.32302 au 
 T_jup = 3.351 
[ 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 12.7   n/a MPO435856  
diameter diameter 8.089 km 0.130 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 16.764 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Marchini, A.; Papini, R.; Salvaggio, F. (2018) Minor Planet Bull. 45, 195-197.]
geometric albedo albedo 0.227   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

16943 (1998 HP42)          Discovered 1998-Apr-23 by JPL/GEODSS NEAT at Haleakala
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HP42 = 1958 TR = 1975 YK = 1985 FY2 = 1989 CF9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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