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24644 (1985 DA)
Classification: Inner Main-belt Asteroid          SPK-ID: 2024644
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07385988477512469 4.4184e-08  
a 1.899070647272433 5.1972e-09 au
q 1.75880550808507 8.5257e-08 au
i 23.25621141182143 4.8977e-06 deg
node 155.9521541464138 8.4958e-06 deg
peri 5.272711204182216 2.4282e-05 deg
M 321.1065500690827 2.3117e-05 deg
tp 2459499.772353793326
(2021-Oct-12.27235379)
6.1446e-05 TDB
period 955.8948211494047
2.62
3.924e-06
1.074e-08
d
yr
n .3766104722349287 1.546e-09 deg/d
Q 2.039335786459797 5.5811e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1289  
   data-arc span      13110 days (35.89 yr)  
   first obs. used      1985-02-24  
   last obs. used      2021-01-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46589  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 15:19:37  

Additional Information
 Earth MOID = .769532 au 
 Jupiter MOID = 2.94306 au 
 T_jup = 3.847 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457452.5 (2016-Mar-05.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07361003707256313 4.419e-08  
q 1.75914238501729 8.5242e-08 au
tp 2457588.412300631207
(2016-Jul-18.91230063)
6.0897e-05 TDB
node 155.9851557177057 8.4969e-06 deg
peri 5.405147445931537 2.4342e-05 deg
i 23.25351897192086 4.8976e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1289  
   data-arc span      13110 days (35.89 yr)  
   first obs. used      1985-02-24  
   last obs. used      2021-01-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46589  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 15:19:37  

Additional Information
 Jupiter MOID = 2.94306 au 
 T_jup = 3.847 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.952745253906121E-15 -3.761204177617555E-15 5.583417401189098E-13 2.18690368812914E-15 2.094765586544644E-13 -6.101580035794336E-15
q -3.761204177617555E-15 7.266248779943425E-15 -1.0528373134758E-12 -4.372546322628571E-15 -3.955630633480739E-13 1.189137127656717E-14
tp 5.583417401189098E-13 -1.0528373134758E-12 3.708484155416481E-9 -8.712492612706125E-12 1.395828263278587E-9 -4.33323984437323E-12
node 2.18690368812914E-15 -4.372546322628571E-15 -8.712492612706125E-12 7.21966651185378E-11 -6.879673639536872E-11 1.035275033983151E-11
peri 2.094765586544644E-13 -3.955630633480739E-13 1.395828263278587E-9 -6.879673639536872E-11 5.925211680044535E-10 -1.120429949520735E-11
i -6.101580035794336E-15 1.189137127656717E-14 -4.33323984437323E-12 1.035275033983151E-11 -1.120429949520735E-11 2.398673257568454E-11

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 15.90   n/a MPCxxxxx  

24644 (1985 DA)          Discovered 1985-Feb-24 by Helin, E. F. at Palomar
Reference: 20010606/Numbers.arcLast Updated: 2004-04-19

[ 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
2181-Jun-02 08:46 < 00:01 Mars 0.0981684134817539 0.0981654762360655 0.0981713511258483 9.43694949970409 9.4366404631158 2517806.865608035 0.559646525093328 345.62175195404 12.7420231568489 -65.0080029016594 1049201.1214067 T 28 CATAB v2.0g-lin.ifort 2021-Aug-25 15:19:40 2021-Aug-25 15:19

Alternate Designations
 1985 DA = 1998 EQ16 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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