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 ]  
85544 (1997 WJ50)
Classification: Main-belt Asteroid          SPK-ID: 2085544
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06942642450810135 3.9894e-08  
a 2.724651993392154 1.5227e-08 au
q 2.535489147462065 1.1302e-07 au
i 7.685181736927307 4.6882e-06 deg
node 229.1586345698748 3.2132e-05 deg
peri 191.6796311940518 4.8706e-05 deg
M 354.6276893963828 3.5819e-05 deg
tp 2459025.014531599718
(2020-Jun-24.51453160)
0.00016349 TDB
period 1642.725454100984
4.50
1.3771e-05
3.77e-08
d
yr
n .2191480013299103 1.8371e-09 deg/d
Q 2.913814839322242 1.6284e-08 au
  Orbit Determination Parameters
   # obs. used (total)      765  
   data-arc span      8119 days (22.23 yr)  
   first obs. used      1997-11-02  
   last obs. used      2020-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51066  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:34:07  

Additional Information
 Earth MOID = 1.54827 au 
 Jupiter MOID = 2.36233 au 
 T_jup = 3.341 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457234.5 (2015-Jul-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06823742358384424 4.0012e-08  
q 2.539149252620498 1.1326e-07 au
tp 2457372.907160701374
(2015-Dec-16.40716070)
0.00016447 TDB
node 229.1997980800543 3.2179e-05 deg
peri 189.7769003659673 4.9234e-05 deg
i 7.677234708884263 4.6889e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      765  
   data-arc span      8119 days (22.23 yr)  
   first obs. used      1997-11-02  
   last obs. used      2020-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51066  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:34:07  

Additional Information
 Jupiter MOID = 2.36233 au 
 T_jup = 3.341 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.600945359884881E-15 -4.497898101587337E-15 -1.80171977734186E-12 6.976684540441176E-15 -3.796208977935094E-13 -1.796685939176504E-15
q -4.497898101587337E-15 1.282855881694382E-14 5.199412535521768E-12 -1.939157454226477E-14 1.090071472281837E-12 5.232419003970968E-15
tp -1.80171977734186E-12 5.199412535521768E-12 2.705110170492295E-8 -8.327158577906721E-12 6.148329511138673E-9 5.260999950945615E-12
node 6.976684540441176E-15 -1.939157454226477E-14 -8.327158577906721E-12 1.035463635098044E-9 -1.02748152285129E-9 -4.69781679801044E-11
peri -3.796208977935094E-13 1.090071472281837E-12 6.148329511138673E-9 -1.02748152285129E-9 2.423982459020506E-9 4.770638153420874E-11
i -1.796685939176504E-15 5.232419003970968E-15 5.260999950945615E-12 -4.69781679801044E-11 4.770638153420874E-11 2.198586503833836E-11

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 MPO453286  
diameter diameter 4.606 km 0.148 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.053   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85544 (1997 WJ50)          Discovered 1997-Nov-28 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1997 WJ50 = 2001 QX226 
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 08:11 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin