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
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
305946 (2009 HJ17)
Classification: Main-belt Asteroid          SPK-ID: 2305946
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09003819098232417 8.2328e-08  
a 3.005381127366831 5.0593e-08 au
q 2.734782047446303 2.4741e-07 au
i 9.06298000779392 1.2706e-05 deg
node 204.4864404421928 5.3908e-05 deg
peri 102.4844306698121 8.7951e-05 deg
M 241.1487143035778 7.3484e-05 deg
tp 2459228.774079553052
(2021-Jan-14.27407955)
0.00039686 TDB
period 1903.039309282857
5.21
4.8054e-05
1.316e-07
d
yr
n .1891710792540921 4.7768e-09 deg/d
Q 3.275980207287359 5.5148e-08 au
  Orbit Determination Parameters
   # obs. used (total)      95  
   data-arc span      8559 days (23.43 yr)  
   first obs. used      1995-10-28  
   last obs. used      2019-04-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65165  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 12:11:30  

Additional Information
 Earth MOID = 1.73828 au 
 Jupiter MOID = 1.95995 au 
 T_jup = 3.226 
[ 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 16.8   n/a MPO264763  

305946 (2009 HJ17)          Discovered 2009-Apr-18 by Spacewatch at Kitt Peak
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

[ 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
1965-Mar-11 08:48 00:04 Jupiter 1.95034227179349 1.95034139328417 1.95034315030258 3.85542821813768 3.7410878312994 2438830.866927819 3.81749858372003 265.715074136445 36.0406825894268 88.2898932482749 1214735.44317131 T 9 CATAB v2.0e-lin.ifort 2019-Jul-14 12:11:32 2019-Jul-14 12:11
2011-Oct-04 18:49 < 00:01 Jupiter 1.99145042885466 1.99144939508157 1.99145146262764 4.46513458970244 4.36884057891269 2455839.283735032 0.404751222550405 87.6618134259729 44.7662744621027 -79.9860509866228 1444106.2214452 T 9 CATAB v2.0e-lin.ifort 2019-Jul-14 12:11:32 2019-Jul-14 12:11
2095-Aug-26 09:52 00:06 Jupiter 1.96112187031252 1.96112090537668 1.96112283525314 3.88459004796185 3.77176690472213 2486480.911163036 6.12486781368697 376.7405129291 37.4559897011502 85.3595627842536 1304408.6486708 T 9 CATAB v2.0e-lin.ifort 2019-Jul-14 12:11:32 2019-Jul-14 12:11

Alternate Designations
 2009 HJ17 = 2006 WY37 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Dec-10 17:06 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin