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471241 (2011 BX18)
Classification: Apollo [NEO, PHA]          SPK-ID: 2471241
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 70 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7294867680924 2.4278e-08  
a 2.877993276687203 7.6741e-08 au
q .778535262684999 6.2279e-08 au
i 14.55210642015867 1.5672e-05 deg
node 310.9052373581343 2.4383e-05 deg
peri 303.9461425360815 2.4796e-05 deg
M 290.2193662716072 1.1581e-05 deg
tp 2459346.173031169938
(2021-May-11.67303117)
7.1123e-05 TDB
period 1783.335641598563
4.88
7.1328e-05
1.953e-07
d
yr
n .2018688975886221 8.0741e-09 deg/d
Q 4.977451290689407 1.3272e-07 au
  Orbit Determination Parameters
   # obs. used (total)      328  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      2104 days (5.76 yr)  
   first obs. used      2011-01-26  
   last obs. used      2016-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46795  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-21 06:20:41  

Additional Information
 Earth MOID = .0280171 au 
 Jupiter MOID = .984834 au 
 T_jup = 2.793 
[ 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 18.2   n/a MPO383349  
diameter diameter 1.451 km 0.221 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  
rotation period rot_per 4.828 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:
[Warner, B.D. (2017) Minor Planet Bull. 44, 22-36.]
geometric albedo albedo 0.044   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

471241 (2011 BX18)          Discovered 2011-Jan-26 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2016-08-22

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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