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101901 (1999 QD2)
Classification: Mars-crossing Asteroid          SPK-ID: 2101901
[ 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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06073886310364605 3.3669e-08  
a 1.685793675030306 5.0784e-09 au
q 1.583400483781648 5.6901e-08 au
i 23.28581738295046 4.4546e-06 deg
node 154.0247211519314 9.1708e-06 deg
peri 122.9183627601967 4.8672e-05 deg
M 226.1699638634011 5.1956e-05 deg
tp 2459297.705027350001
(2021-Mar-24.20502735)		 0.0001163 TDB
period 799.475311631785
2.19		 3.6126e-06
9.891e-09		 d
yr
n .450295330902983 2.0348e-09 deg/d
Q 1.788186866278965 5.3869e-09 au
   Orbit Determination Parameters
   # obs. used (total)      517  
   data-arc span      7550 days (20.67 yr)  
   first obs. used      1999-07-22  
   last obs. used      2020-03-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54154  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:57:53  

Additional Information
 Earth MOID = .607373 au 
 Jupiter MOID = 3.32277 au 
 T_jup = 4.130 
[ 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 17.2   n/a MPO502728  

101901 (1999 QD2)          Discovered 1999-Aug-22 by LONEOS at Anderson Mesa
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ 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
2000-Nov-08 05:38 < 00:01 Mars 0.0715322078280033 0.0715315840781289 0.071532831582505 9.28800397971291 9.28757306409086 2451856.734722765 0.0910483152675663 44.0117317026012 12.1070623780505 -47.3820382454817 669789.595862582 T 22 CATAB v2.0f-lin.ifort 2020-Nov-12 19:57:54 2020-Nov-12 19:57
2121-Mar-25 13:14 < 00:01 Mars 0.0640761484668377 0.064075665760705 0.0640766315402279 9.21308779768345 9.21260282641671 2495823.051546403 0.28266496152849 266.901858798561 9.98025634303333 85.2870001339458 959762.738555616 T 22 CATAB v2.0f-lin.ifort 2020-Nov-12 19:57:54 2020-Nov-12 19:57
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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