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 ]  
27998 (1997 WU8)
Classification: Main-belt Asteroid          SPK-ID: 2027998
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1249246061961381 4.3388e-08  
a 2.726124725895287 1.088e-08 au
q 2.385564668071263 1.1879e-07 au
i 2.609724639284833 4.5361e-06 deg
node 152.545495226365 8.3445e-05 deg
peri 214.1943990327395 8.4833e-05 deg
M 39.70046602671484 1.4523e-05 deg
tp 2458819.194861200965
(2019-Dec-01.69486120)
6.6169e-05 TDB
period 1644.057526270141
4.50
9.8423e-06
2.695e-08
d
yr
n .2189704400531098 1.3109e-09 deg/d
Q 3.06668478371931 1.2239e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1250  
   data-arc span      10007 days (27.40 yr)  
   first obs. used      1992-09-03  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55752  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 01:14:30  

Additional Information
 Earth MOID = 1.38453 au 
 Jupiter MOID = 2.3916 au 
 T_jup = 3.344 
[ 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 14.6   n/a MPO400284  
diameter diameter 3.685 km 0.133 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.188   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

27998 (1997 WU8)          Discovered 1997-Nov-20 by Spacewatch at Kitt Peak
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

[ 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
1917-Jul-18 12:29 00:05 Europ 0.0316599336000345 0.0316532829426273 0.0316665885724373 2.85180702523346 2.85180690751581 2421428.020481141 4.66680416859437 674.473896250845 44.4350941675215 -60.7916204507764 92975.2458656342 T 19 CATAB v2.0f-lin.ifort 2020-Feb-23 01:14:44 2020-Feb-23 01:14
2118-Apr-04 11:15 00:02 Eunom 0.035701961473658 0.035684199405897 0.0357197242448527 4.6752268981323 4.6752268140317 2494736.968731758 2.29401406371324 919.629376447164 29.4957539788392 -15.7686904323071 49482.7479788725 T 19 CATAB v2.0f-lin.ifort 2020-Feb-23 01:14:44 2020-Feb-23 01:14

Alternate Designations
 1997 WU8 = 1999 CQ47 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Sep-29 05:17 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin