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JPL Small-Body Database Browser
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18717 (1998 HZ127)
Classification: Outer Main-belt Asteroid          SPK-ID: 2018717
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1141254481688321 3.7563e-08  
a 3.206350641608946 2.3176e-08 au
q 2.840424437648903 1.2053e-07 au
i .9666405930714179 5.2274e-06 deg
node 199.0063972087287 0.00024515 deg
peri 62.84417427815831 0.0002466 deg
M 257.4249509260143 3.0225e-05 deg
tp 2459598.022386649296
(2022-Jan-18.52238665)
0.00017882 TDB
period 2097.079759022026
5.74
2.2737e-05
6.225e-08
d
yr
n .1716672904076315 1.8612e-09 deg/d
Q 3.572276845568989 2.5821e-08 au
  Orbit Determination Parameters
   # obs. used (total)      879  
   data-arc span      21652 days (59.28 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57649  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 00:51:49  

Additional Information
 Earth MOID = 1.82507 au 
 Jupiter MOID = 1.48901 au 
 T_jup = 3.182 
[ 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 14.4   n/a MPO257001  
diameter diameter 6.828 km 0.220 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.072   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

18717 (1998 HZ127)          Discovered 1998-Apr-18 by LINEAR at Socorro
Reference: 20001111/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HZ127 = 1988 RJ10 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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