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(2015 HE1)
Classification: Apollo [NEO]          SPK-ID: 3716437
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2457131.5 (2015-Apr-19.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4920540982793941 0.00070431  
a 1.4189478307338 0.0014252 au
q .7207487353765776 0.00027548 au
i 3.452665722297381 0.0043693 deg
node 212.2414739670452 0.00040608 deg
peri 79.52308064279867 0.00051766 deg
M 327.8695935712653 0.064365 deg
tp 2457186.601292717693
(2015-Jun-13.10129272)
0.027366 TDB
period 617.3736215371815
1.69
0.93014
0.002547
d
yr
n .5831152926547881 0.00087853 deg/d
Q 2.117146926091022 0.0021265 au
  Orbit Determination Parameters
   # obs. used (total)      40  
   data-arc span      2 days  
   first obs. used      2015-04-18  
   last obs. used      2015-04-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      8  
   norm. resid. RMS      .40565  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 08:34:21  

Additional Information
 Earth MOID = .00237681 au 
 Jupiter MOID = 3.08773 au 
 T_jup = 4.575 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 26.5   n/a MPO337063  

[ 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
1987-Feb-03 14:30 9_13:24 Mars 0.0827403809264139 0.0446807140023691 0.225285699074719 9.30184650765703 9.3014745202945 2446830.104006662 13764.0428108392 7538490.84716763 333.781821464612 -32.6900548247952 20425.8280508027 T 9 CATAB v2.0e-lin.ifort 2017-Nov-30 05:02:59 2018-Dec-11 16:37
1988-Apr-20 09:08 9_02:01 Earth 0.0124902217886934 0.00304350600170263 0.136921956951269 14.2477773586732 14.2327969569596 2447271.880271126 13080.7517273754 6222158.17904331 47.430308921039 -14.1515183677253 9273.86074158291 T 9 CATAB v2.0e-lin.ifort 2017-Nov-30 05:02:59 2018-Dec-11 16:37
2008-Oct-28 20:26 6_13:59 Earth 0.448554993899075 0.26419028101016 0.633103288121614 28.0347361192376 28.034524233449 2454768.351341082 9479.03258433498 9209225.26539273 48.8427117880697 -2.57704191430535 59635.6385360805 T 9 CATAB v2.0e-lin.ifort 2017-Nov-30 05:02:59 2018-Dec-11 16:37
2010-Mar-30 13:19 5_03:43 Earth 0.402015785902661 0.264919945282813 0.539183307791177 26.5582236258556 26.5579740674128 2455286.054591197 7423.44480919422 6843440.21433823 24.0546097230148 2.12139367529669 90901.4025319474 T 9 CATAB v2.0e-lin.ifort 2017-Nov-30 05:02:59 2018-Dec-11 16:37
2015-Apr-21 04:34 < 00:01 Earth 0.00849126257505306 0.00845712116602804 0.0085254031530002 14.3841411746692 14.3623095603327 2457133.690351814 0.0384616928192497 1697.30403666256 3.11854584972185 0.244086037944586 540.669312601647 T 9 CATAB v2.0e-lin.ifort 2017-Nov-30 05:02:59 2018-Dec-11 16:37
2015-Apr-21 10:58 00:01 Moon 0.00681237738507726 0.00677777141891605 0.00684698335720233 15.0454080807834 15.0450883233009 2457133.957002427 1.42304309154682 1725.68903871365 3.18299697639896 0.567322018033782 2623.7269770308 T 9 CATAB v2.0e-lin.ifort 2017-Nov-30 05:02:59 2018-Dec-11 16:37
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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