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20328 (1998 HS42)
Classification: Main-belt Asteroid          SPK-ID: 2020328
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2728398659168196 2.8603e-08  
a 2.777023516323655 1.1128e-08 au
q 2.019340792482054 7.868e-08 au
i 8.359793156619711 4.761e-06 deg
node 154.0932124554747 2.2195e-05 deg
peri 107.9889313503467 2.3791e-05 deg
M 292.8724718924958 8.1022e-06 deg
tp 2459515.685273321523
(2021-Oct-28.18527332)
3.8715e-05 TDB
period 1690.315457676798
4.63
1.016e-05
2.782e-08
d
yr
n .2129779967194946 1.2801e-09 deg/d
Q 3.534706240165256 1.4164e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1735  
   data-arc span      9714 days (26.60 yr)  
   first obs. used      1994-08-10  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50937  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:17:19  

Additional Information
 Earth MOID = 1.02118 au 
 Jupiter MOID = 1.65143 au 
 T_jup = 3.264 
[ 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 13.91   n/a E2021B10  
diameter diameter 10.294 km 0.294 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 3.412 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 0.035   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20328 (1998 HS42)          Discovered 1998-Apr-30 by Linderholm, R. at Lime Creek
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HS42 = 1994 PH13 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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