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19457 Robcastillo (1998 HE6)
Classification: Outer Main-belt Asteroid          SPK-ID: 2019457
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1143831360276976 3.6949e-08  
a 3.220849933975726 1.8869e-08 au
q 2.852439017852979 1.1483e-07 au
i 7.847303669688841 4.34e-06 deg
node 180.0242617215928 2.6004e-05 deg
peri 224.7049578874492 3.2489e-05 deg
M 125.6366204745839 1.8126e-05 deg
tp 2458463.668968616056
(2018-Dec-11.16896862)
0.00010589 TDB
period 2111.32049155908
5.78
1.8553e-05
5.08e-08
d
yr
n .170509404630541 1.4984e-09 deg/d
Q 3.589260850098472 2.1027e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1658  
   data-arc span      15893 days (43.51 yr)  
   first obs. used      1977-09-09  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4996  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:54:18  

Additional Information
 Earth MOID = 1.86652 au 
 Jupiter MOID = 1.85804 au 
 T_jup = 3.164 
[ 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 13.60   n/a E2021B10  
diameter diameter 10.870 km 0.201 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 4.35485 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:
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.045   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19457 Robcastillo           Discovered 1998 Apr. 21 by the OCA-DLR Asteroid Survey at Caussols.
Roberto Castillo (b. 1961) works at the European Southern Observatory's Paranal site, where he takes care of several instruments. He also builds telescopes for amateurs, and it is said that half the amateur telescopes in Chile have been constructed by him.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20031110/MPCPages.arcLast Updated: 2003-11-12

[ show close-approach data ]
Alternate Designations
 1998 HE6 = 1977 RP11 
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