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 ]  
523815 (2009 HW44)
Classification: Amor [NEO]          SPK-ID: 2523815
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 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5923361029108569 1.5869e-07  
a 2.687129991529267 1.3124e-07 au
q 1.095445884331937 3.7953e-07 au
i 41.08139437557967 2.7649e-05 deg
node 37.86068761370219 8.2867e-06 deg
peri 296.5698705482359 4.1444e-05 deg
M 141.8873642830628 8.6029e-06 deg
tp 2458366.378232202340
(2018-Sep-04.87823220)
3.859e-05 TDB
period 1608.908852177529
4.40
0.00011787
3.227e-07
d
yr
n .2237541297089445 1.6393e-08 deg/d
Q 4.278814098726596 2.0898e-07 au
  Orbit Determination Parameters
   # obs. used (total)      204  
   data-arc span      3544 days (9.70 yr)  
   first obs. used      2009-04-22  
   last obs. used      2019-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .31988  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-21 06:22:25  

Additional Information
 Earth MOID = .318524 au 
 Jupiter MOID = 2.42149 au 
 T_jup = 2.809 
[ 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 17.5   n/a MPO159141  
rotation period rot_per 6.85 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Warner, B.D.; Stephens, R.D. (2019) Minor Planet Bull. 46, 144-152.]

523815 (2009 HW44)          Discovered 2009-Apr-22 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2018-10-30

[ 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-10 06:50 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin