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JPL Small-Body Database Browser
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19481 (1998 HX101)
Classification: Main-belt Asteroid          SPK-ID: 2019481
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06045526043587324 4.9342e-08  
a 3.124655079323854 2.7074e-08 au
q 2.935753242731056 1.597e-07 au
i 12.8348788322588 5.8654e-06 deg
node 50.30082058379745 2.771e-05 deg
peri 212.3333024366947 7.0534e-05 deg
M 325.5905344069386 6.8452e-05 deg
tp 2459193.331056074458
(2020-Dec-09.83105607)
0.0003841 TDB
period 2017.444298838599
5.52
2.6221e-05
7.179e-08
d
yr
n .1784435883594132 2.3193e-09 deg/d
Q 3.313556915916652 2.8711e-08 au
  Orbit Determination Parameters
   # obs. used (total)      876  
   data-arc span      11932 days (32.67 yr)  
   first obs. used      1987-05-30  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55959  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:49:08  

Additional Information
 Earth MOID = 1.92931 au 
 Jupiter MOID = 1.72005 au 
 T_jup = 3.174 
[ 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 13.8   n/a MPO474022  
diameter diameter 7.265 km 0.400 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.796 h n/a LCDB (Rev. 2019-August); 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 0.133   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19481 (1998 HX101)          Discovered 1998-Apr-25 by Elst, E. W. at La Silla
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 HX101 = 1987 KP = 2000 SB155 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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