Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
46771 (1998 HM7)
Classification: Mars-crossing Asteroid          SPK-ID: 2046771
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2992076135410389 4.7097e-08  
a 2.307538496405809 1.2483e-08 au
q 1.617105409742149 1.1003e-07 au
i 23.55559154623124 5.7696e-06 deg
node 56.48091898770058 1.1372e-05 deg
peri 280.59941096 1.466e-05 deg
M 18.29306035782795 1.3356e-05 deg
tp 2458935.441248314687
(2020-Mar-26.94124831)
4.7208e-05 TDB
period 1280.329816256819
3.51
1.039e-05
2.845e-08
d
yr
n .2811775492759346 2.2817e-09 deg/d
Q 2.997971583069468 1.6219e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1036  
   data-arc span      13318 days (36.46 yr)  
   first obs. used      1984-05-30  
   last obs. used      2020-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49954  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 21:23:09  

Additional Information
 Earth MOID = .776835 au 
 Jupiter MOID = 2.83886 au 
 T_jup = 3.420 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457383.5 (2015-Dec-27.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .299422519243713 4.7068e-08  
q 1.6164667550997 1.0995e-07 au
tp 2457655.819645616611
(2016-Sep-24.31964562)
4.2519e-05 TDB
node 56.48750225502296 1.137e-05 deg
peri 280.76240664103 1.4659e-05 deg
i 23.56057504648072 5.771e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1036  
   data-arc span      13318 days (36.46 yr)  
   first obs. used      1984-05-30  
   last obs. used      2020-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49954  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 21:23:09  

Additional Information
 Jupiter MOID = 2.83886 au 
 T_jup = 3.420 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.21536337410799E-15 -5.15881781857597E-15 -2.318723064844511E-13 5.838070629278993E-15 2.656434368415697E-14 2.548390177807492E-15
q -5.15881781857597E-15 1.208802804834795E-14 6.656314782950226E-13 -1.339814539089492E-14 -3.838463407533743E-14 -4.94130151626233E-15
tp -2.318723064844511E-13 6.656314782950226E-13 1.807893761725449E-9 3.662362341810406E-12 4.054809454142319E-10 3.598260119742823E-12
node 5.838070629278993E-15 -1.339814539089492E-14 3.662362341810406E-12 1.292694509312922E-10 -1.170034991719454E-10 -1.321635147043213E-11
peri 2.656434368415697E-14 -3.838463407533743E-14 4.054809454142319E-10 -1.170034991719454E-10 2.148949007389008E-10 1.319496257592122E-11
i 2.548390177807492E-15 -4.94130151626233E-15 3.598260119742823E-12 -1.321635147043213E-11 1.319496257592122E-11 3.330429253169294E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.6   n/a MPO385115  

46771 (1998 HM7)          Discovered 1998-Apr-23 by LINEAR at Socorro
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jan-27 11:59 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin