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 ]  
305958 (2009 HE45)
Classification: Main-belt Asteroid          SPK-ID: 2305958
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1683177089133011 7.386e-08  
a 3.114745323391484 3.5688e-08 au
q 2.59047852670981 2.4559e-07 au
i 6.652235505705828 7.0603e-06 deg
node 62.89378040178521 6.4602e-05 deg
peri 185.212412999904 6.8274e-05 deg
M 332.5431567829913 2.5079e-05 deg
tp 2459153.637073591328
(2020-Oct-31.13707359)
0.00014087 TDB
period 2007.854510336689
5.50
3.4508e-05
9.448e-08
d
yr
n .1792958594094714 3.0815e-09 deg/d
Q 3.639012120073157 4.1695e-08 au
  Orbit Determination Parameters
   # obs. used (total)      209  
   data-arc span      8031 days (21.99 yr)  
   first obs. used      1998-05-01  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53576  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 20:02:01  

Additional Information
 Earth MOID = 1.57684 au 
 Jupiter MOID = 1.3944 au 
 T_jup = 3.186 
[ 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 15.9   n/a MPO471211  
diameter diameter 4.772 km 0.088 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.037   0.002 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

305958 (2009 HE45)          Discovered 2009-Apr-21 by La Sagra at La Sagra
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Oct-29 03:01 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin