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JPL Small-Body Database Browser
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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1142113436644365 3.807e-08  
a 3.221513541721838 1.9295e-08 au
q 2.85358015148861 1.1904e-07 au
i 7.846078717208443 4.4898e-06 deg
node 180.0270344098405 2.7681e-05 deg
peri 224.7875204278026 3.455e-05 deg
M 91.46452066111 1.8939e-05 deg
tp 2458463.914996661858
(2018-Dec-11.41499666)
0.00011106 TDB
period 2111.97303397519
5.78
1.8975e-05
5.195e-08
d
yr
n .170456721846681 1.5314e-09 deg/d
Q 3.589446931955067 2.1499e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1522  
   data-arc span      15489 days (42.41 yr)  
   first obs. used      1977-09-09  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50787  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:48:31  

Additional Information
 Earth MOID = 1.86869 au 
 Jupiter MOID = 1.8567 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 13.5   n/a MPO337422  
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 4.354966 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 sidereal period (not synodic); 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.]
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 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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