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 ]  
312609 (2009 RW55)
Classification: Jupiter Trojan          SPK-ID: 2312609
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04799536508648994 8.258e-08  
a 5.275228604914678 4.3941e-07 au
q 5.022042082107102 7.8813e-07 au
i 5.104251342976958 6.41e-06 deg
node 64.61286216672426 9.2373e-05 deg
peri 10.81157536211679 0.00019255 deg
M 276.0063220366663 0.00018603 deg
tp 2460033.034215754798
(2023-Mar-29.53421575)
0.0024 TDB
period 4425.479710913402
12.12
0.00055294
1.514e-06
d
yr
n .08134711342416195 1.0164e-08 deg/d
Q 5.528415127722253 4.605e-07 au
  Orbit Determination Parameters
   # obs. used (total)      197  
   data-arc span      6374 days (17.45 yr)  
   first obs. used      2002-03-12  
   last obs. used      2019-08-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60735  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 06:02:06  

Additional Information
 Earth MOID = 4.03726 au 
 Jupiter MOID = .0215132 au 
 T_jup = 2.990 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457090.5 (2015-Mar-09.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04751513322339095 8.0576e-08  
q 5.02475601373263 7.7373e-07 au
tp 2455624.748071194994
(2011-Mar-04.24807120)
0.0019653 TDB
node 64.63059371898407 9.2288e-05 deg
peri 11.98778553150533 0.000195 deg
i 5.107177590494792 6.4132e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      197  
   data-arc span      6374 days (17.45 yr)  
   first obs. used      2002-03-12  
   last obs. used      2019-08-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60735  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 06:02:06  

Additional Information
 Jupiter MOID = .0215132 au 
 T_jup = 2.990 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.492463099086266E-15 -5.73016315803144E-14 -8.552061803715985E-11 4.68700356677019E-14 -7.935102932732848E-12 -2.103030131540311E-15
q -5.73016315803144E-14 5.986571960730058E-13 1.118349499752832E-9 -5.589819175801634E-13 1.025084861701805E-10 3.317729200192488E-14
tp -8.552061803715985E-11 1.118349499752832E-9 3.862380743373272E-6 -1.714042112285581E-9 3.372780019506488E-7 5.809468264818268E-11
node 4.68700356677019E-14 -5.589819175801634E-13 -1.714042112285581E-9 8.516998861548919E-9 -8.632642530528065E-9 -1.285327050396721E-10
peri -7.935102932732848E-12 1.025084861701805E-10 3.372780019506488E-7 -8.632642530528065E-9 3.802599255611733E-8 1.335280396749364E-10
i -2.103030131540311E-15 3.317729200192488E-14 5.809468264818268E-11 -1.285327050396721E-10 1.335280396749364E-10 4.11288009030215E-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 13.3   n/a MPO455304  
diameter diameter 11.749 km 1.161 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.067   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

312609 (2009 RW55)          Discovered 2009-Sep-15 by Spacewatch at Kitt Peak
Reference: 20120109/Numbers.arcLast Updated: 2012-01-11
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Sep-27 20:21 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin