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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 90 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7586891345934152 3.3374e-08  
a 3.206448786730238 3.4188e-08 au
q .7737509316077674 1.0715e-07 au
i 13.49513247310266 1.5454e-05 deg
node 202.6964805725491 2.9212e-05 deg
peri 238.5888762136431 2.8631e-05 deg
M 22.22902772860327 6.8631e-06 deg
tp 2459071.005043120275
(2020-Aug-09.50504312)
3.799e-05 TDB
period 2097.176045928221
5.74
3.3541e-05
9.183e-08
d
yr
n .1716594087077045 2.7454e-09 deg/d
Q 5.639146641852708 6.0126e-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46306  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 13:04:25  

Additional Information
 Earth MOID = .0102945 au 
 Jupiter MOID = .818161 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. 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:
[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

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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