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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06080130302655885 4.9163e-08  
a 3.125716986922223 2.2358e-08 au
q 2.935669321225103 1.5947e-07 au
i 12.83265615726275 5.8145e-06 deg
node 50.29707044020815 1.8424e-05 deg
peri 212.3692395680103 5.2187e-05 deg
M 1.252533590675818 4.7405e-05 deg
tp 2459193.477208299341
(2020-Dec-09.97720830)
0.00026582 TDB
period 2018.472822651437
5.53
2.1657e-05
5.929e-08
d
yr
n .1783526614577397 1.9136e-09 deg/d
Q 3.315764652619344 2.3717e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1175  
   data-arc span      12107 days (33.15 yr)  
   first obs. used      1987-05-30  
   last obs. used      2020-07-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51825  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:54:53  

Additional Information
 Earth MOID = 1.92765 au 
 Jupiter MOID = 1.71708 au 
 T_jup = 3.173 
[ 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 13.85   n/a E2021B10  
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. 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 0.133   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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