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 ]  
16828 (1997 WR2)
Classification: Main-belt Asteroid          SPK-ID: 2016828
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04756823707390974 2.8949e-08  
a 2.276034455556271 7.3273e-09 au
q 2.167767508985984 6.627e-08 au
i 1.435811607948929 3.413e-06 deg
node 239.384059552819 0.00015782 deg
peri 197.1097731969679 0.00016427 deg
M 255.9069813565155 4.561e-05 deg
tp 2459563.148409928848
(2021-Dec-14.64840993)
0.00015925 TDB
period 1254.199650233289
3.43
6.0565e-06
1.658e-08
d
yr
n .2870356405641142 1.3861e-09 deg/d
Q 2.384301402126559 7.6758e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1874  
   data-arc span      10821 days (29.63 yr)  
   first obs. used      1990-11-23  
   last obs. used      2020-07-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51727  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:43:21  

Additional Information
 Earth MOID = 1.18238 au 
 Jupiter MOID = 2.70972 au 
 T_jup = 3.607 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456580.5 (2013-Oct-15.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04780731278540525 2.9067e-08  
q 2.166974014250467 6.6622e-08 au
tp 2457054.290619095164
(2015-Jan-31.79061910)
0.00015563 TDB
node 239.5474936606814 0.00015774 deg
peri 196.6914088925138 0.00016408 deg
i 1.436129108442614 3.4133e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1874  
   data-arc span      10821 days (29.63 yr)  
   first obs. used      1990-11-23  
   last obs. used      2020-07-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51727  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 01:43:21  

Additional Information
 Jupiter MOID = 2.70972 au 
 T_jup = 3.607 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.448858806985336E-16 -1.926169639034998E-15 -4.994759769191127E-13 8.396162606086944E-15 -1.557661134873392E-13 -8.960723160490821E-17
q -1.926169639034998E-15 4.438455868205135E-15 1.288483650630554E-12 -1.868824873682749E-14 3.931157536796389E-13 2.153247460142664E-16
tp -4.994759769191127E-13 1.288483650630554E-12 2.422132149843377E-8 -1.076887500666816E-11 7.048752223680998E-9 1.244478548842798E-13
node 8.396162606086944E-15 -1.868824873682749E-14 -1.076887500666816E-11 2.48815670143344E-8 -2.48763997424099E-8 -1.035974750574787E-10
peri -1.557661134873392E-13 3.931157536796389E-13 7.048752223680998E-9 -2.48763997424099E-8 2.692367567844212E-8 1.035989781579894E-10
i -8.960723160490821E-17 2.153247460142664E-16 1.244478548842798E-13 -1.035974750574787E-10 1.035989781579894E-10 1.165061567147502E-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 14.93   n/a E2021B10  
diameter diameter 2.642 km 0.245 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.366   0.118 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

16828 (1997 WR2)          Discovered 1997-Nov-23 by Kobayashi, T. at Oizumi
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 WR2 = 1992 GJ7 = 1999 JY39 = 1999 LK32 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-May-13 08:58 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin