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 ]  
305960 (2009 HT45)
Classification: Main-belt Asteroid          SPK-ID: 2305960
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1374747689182452 5.6156e-08  
a 3.120207074680505 5.3819e-08 au
q 2.691257328111729 1.9598e-07 au
i 16.89709515318716 1.0231e-05 deg
node 30.28491734295422 2.0124e-05 deg
peri 273.1096871020769 4.4838e-05 deg
M 284.8610854476761 3.8947e-05 deg
tp 2459420.680572970188
(2021-Jul-25.18057297)
0.00022122 TDB
period 2013.138028017861
5.51
5.2086e-05
1.426e-07
d
yr
n .1788252941376586 4.6267e-09 deg/d
Q 3.549156821249281 6.1218e-08 au
  Orbit Determination Parameters
   # obs. used (total)      165  
   data-arc span      5339 days (14.62 yr)  
   first obs. used      2005-09-13  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65579  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 20:02:01  

Additional Information
 Earth MOID = 1.7448 au 
 Jupiter MOID = 1.8704 au 
 T_jup = 3.135 
[ 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 15.3   n/a MPO471211  
diameter diameter 4.762 km 0.143 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.054   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

305960 (2009 HT45)          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-Aug-11 17:46 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin