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414287 (2008 OB9)
Classification: Apollo [NEO, PHA]          SPK-ID: 2414287
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 89 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7586639581609073 3.3382e-08  
a 3.206210110765253 3.4203e-08 au
q .7737740574365652 1.0714e-07 au
i 13.4949376611235 1.5454e-05 deg
node 202.6975698039951 2.9213e-05 deg
peri 238.5907471424325 2.8632e-05 deg
M 347.8955052030535 6.3365e-06 deg
tp 2459071.006728374186
(2020-Aug-09.50672837)
3.799e-05 TDB
period 2096.941891462486
5.74
3.3555e-05
9.187e-08
d
yr
n .1716785770105067 2.7471e-09 deg/d
Q 5.638646164093941 6.0152e-08 au
  Orbit Determination Parameters
   # obs. used (total)      321  
   data-arc span      2457 days (6.73 yr)  
   first obs. used      2008-07-29  
   last obs. used      2015-04-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46289  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-21 06:18:04  

Additional Information
 Earth MOID = .00966596 au 
 Jupiter MOID = .817928 au 
 T_jup = 2.617 
[ 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 17.7   n/a MPO339286  
diameter diameter 1.974 km 0.948 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
rotation period rot_per 42.5 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. (2015) Minor Planet Bull. 42, 41-53.]
geometric albedo albedo 0.038   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

414287 (2008 OB9)          Discovered 2008-Jul-29 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2014-11-10

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