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305840 (2009 DT138)
Classification: Main-belt Asteroid          SPK-ID: 2305840
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02840657872915968 6.2151e-08  
a 2.904208697577148 4.2137e-08 au
q 2.821710064563512 1.9104e-07 au
i 2.972516219982528 6.0296e-06 deg
node 109.7587243829269 0.00013979 deg
peri 230.6940007714414 0.00018785 deg
M 305.060982694365 0.00012983 deg
tp 2459276.378938072979
(2021-Mar-02.87893807)
0.00065417 TDB
period 1807.757447748994
4.95
3.9343e-05
1.077e-07
d
yr
n .1991417601118277 4.334e-09 deg/d
Q 2.986707330590783 4.3334e-08 au
  Orbit Determination Parameters
   # obs. used (total)      165  
   data-arc span      5487 days (15.02 yr)  
   first obs. used      2004-04-16  
   last obs. used      2019-04-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .70975  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 17:58:05  

Additional Information
 Earth MOID = 1.81315 au 
 Jupiter MOID = 2.11818 au 
 T_jup = 3.283 
[ 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 16.6   n/a MPO433970  

305840 (2009 DT138)          Discovered 2009-Feb-20 by Spacewatch at Kitt Peak
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2173-Sep-08 15:03 00:28 Hygie 0.0455247587485993 0.0455035057329673 0.0455462088395069 2.81581949875122 2.81581919734655 2514983.126938181 27.7077076915953 4837.40369415412 82.4584301865471 -77.3920928007708 80311.4542001715 T 12 CATAB v2.0f-lin.ifort 2020-Feb-25 17:58:08 2020-Feb-25 17:58
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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