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450894 (2008 BT18)
Classification: Apollo [NEO, PHA]          SPK-ID: 2450894
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 106 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5932555748642074 1.4892e-08  
a 2.221917854231487 2.5287e-09 au
q .90375270031834 3.3579e-08 au
i 8.135297465041448 5.5746e-06 deg
node 107.6233124813306 1.7434e-05 deg
peri 139.3536511515965 1.7961e-05 deg
M 222.0821487918231 2.9614e-06 deg
tp 2459463.955890457955
(2021-Sep-06.45589046)
1.0682e-05 TDB
period 1209.735499090868
3.31
2.0652e-06
5.654e-09
d
yr
n .2975857121416581 5.0802e-10 deg/d
Q 3.540083008144634 4.0289e-09 au
  Orbit Determination Parameters
   # obs. used (total)      427  
   # delay obs. used      2  
   # Doppler obs. used      1  
   data-arc span      24049 days (65.84 yr)  
   first obs. used      1955-03-14  
   last obs. used      2021-01-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46502  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-16 06:03:50  

Additional Information
 Earth MOID = .0106433 au 
 Jupiter MOID = 1.54727 au 
 T_jup = 3.383 
[ 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 18.3   n/a MPO264974  
rotation period rot_per 2.5702 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:
[Pravec, P.; Wolf, M.; Sarounova, L. (2008) http://www.asu.cas.cz/~ppravec/neo.htm]

450894 (2008 BT18)          Discovered 2008-Jan-31 by LINEAR at Socorro
Reference: Last Updated: 2015-11-30

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