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441434 (2008 HE4)
Classification: Main-belt Asteroid          SPK-ID: 2441434
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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1801902926141303 1.1822e-07  
a 3.088003798728887 5.0785e-08 au
q 2.531575490642383 3.4193e-07 au
i 17.70848755362806 9.5279e-06 deg
node 70.71225196703433 3.0991e-05 deg
peri 110.6355952268041 4.0869e-05 deg
M 99.24558500472443 2.4042e-05 deg
tp 2458454.083429724906
(2018-Dec-01.58342972)
0.00013009 TDB
period 1982.052554677064
5.43
4.8895e-05
1.339e-07
d
yr
n .1816298963165762 4.4806e-09 deg/d
Q 3.644432106815391 5.9936e-08 au
  Orbit Determination Parameters
   # obs. used (total)      133  
   data-arc span      6354 days (17.40 yr)  
   first obs. used      2002-02-08  
   last obs. used      2019-07-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56052  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 10:35:57  

Additional Information
 Earth MOID = 1.59361 au 
 Jupiter MOID = 1.60046 au 
 T_jup = 3.129 
[ 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 16.3   n/a MPO477081  

441434 (2008 HE4)          Discovered 2008-Mar-30 by CSS at Catalina
Reference: Last Updated: 2015-09-02

[ 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
1941-Jun-20 12:42 00:05 Jupiter 1.80194122759707 1.8019371863665 1.8019452689897 4.84273723874867 4.74467930622417 2430166.028956372 4.94795861635226 897.473778430654 30.311913784564 -77.7080869660476 1491431.96845626 T 9 CATAB v2.0f-lin.ifort 2020-Feb-26 10:35:59 2020-Feb-26 10:36
1951-Jan-15 11:12 00:09 Jupiter 1.83201353472499 1.83201108137561 1.83201600188529 0.821367012994265 n/a 2433661.966647257 8.66393677384588 11051.4738132849 85.4201147341115 89.5434537567952 3207498.89793292 F 9 CATAB v2.0f-lin.ifort 2020-Feb-26 10:35:59 2020-Feb-26 10:36
2001-Mar-03 04:23 00:01 Jupiter 1.9663809608316 1.96637945112332 1.96638247054871 5.17624969795611 5.092352791362 2451971.682445487 1.07360498918804 250.771553412928 32.4310802490605 -74.7983893259598 1777946.89896274 T 9 CATAB v2.0f-lin.ifort 2020-Feb-26 10:35:59 2020-Feb-26 10:36
2011-Jan-10 19:24 00:01 Jupiter 1.71043234455277 1.71043097316927 1.71043371593646 2.79595801684543 2.61284558165175 2455572.308219459 1.10095756427647 323.718809929353 62.3221203185941 -78.8611823976656 701517.062423578 T 9 CATAB v2.0f-lin.ifort 2020-Feb-26 10:35:59 2020-Feb-26 10:36
2070-Oct-13 07:50 00:04 Jupiter 1.61803951846598 1.61803744254724 1.61804159439365 3.6550635311725 3.50891943295685 2477397.826288690 4.25083660530217 325.261737101119 95.5646377766162 76.0603468744392 807966.379393378 T 9 CATAB v2.0f-lin.ifort 2020-Feb-26 10:35:59 2020-Feb-26 10:36
2130-Jun-17 01:41 00:08 Jupiter 1.5823594780526 1.58235837145116 1.58236058465539 4.12193409520954 3.98995727151075 2499193.570084466 8.24120034076807 928.012228877649 55.6296018428681 88.5700520622551 1106610.1772857 T 9 CATAB v2.0f-lin.ifort 2020-Feb-26 10:35:59 2020-Feb-26 10:36
2190-Feb-16 22:57 00:13 Jupiter 1.61583378665036 1.61582838662452 1.61583918757347 4.46206803249386 4.34299989644159 2520988.456518644 13.1500269394605 1964.74992094256 35.4679421747527 -82.7809384432337 1311728.47393465 T 9 CATAB v2.0f-lin.ifort 2020-Feb-26 10:35:59 2020-Feb-26 10:36
2199-Jun-21 13:48 00:22 Jupiter 1.98984511861557 1.98983732451714 1.98985291239243 1.79706445135618 1.5421074774177 2524400.075041614 22.4068783034378 2768.88290325802 91.6118504113411 8.85224359300192 137381.771722934 T 9 CATAB v2.0f-lin.ifort 2020-Feb-26 10:35:59 2020-Feb-26 10:36

Alternate Designations
 2008 HE4 = 2013 CX180 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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