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 ]  
27708 (1987 WP)
Classification: Main-belt Asteroid          SPK-ID: 2027708
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2812789571517921 3.7487e-08  
a 2.400869301353881 1.1219e-08 au
q 1.725555288011309 9.1366e-08 au
i 21.07474692059649 4.8127e-06 deg
node 233.9980099201883 1.3435e-05 deg
peri 293.520920669119 1.6482e-05 deg
M 189.203625863311 1.208e-05 deg
tp 2459645.154992936193
(2022-Mar-06.65499294)
4.7613e-05 TDB
period 1358.786441633112
3.72
9.5241e-06
2.608e-08
d
yr
n .2649422962797006 1.8571e-09 deg/d
Q 3.076183314696451 1.4375e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1545  
   data-arc span      11725 days (32.10 yr)  
   first obs. used      1987-10-23  
   last obs. used      2019-11-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43294  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 01:40:57  

Additional Information
 Earth MOID = .825258 au 
 Jupiter MOID = 2.22469 au 
 T_jup = 3.384 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456650.5 (2013-Dec-24.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2809364641301826 3.7492e-08  
q 1.726929447056929 9.1441e-08 au
tp 2456926.226677580666
(2014-Sep-25.72667758)
4.1973e-05 TDB
node 234.0573797677947 1.3424e-05 deg
peri 293.509185046486 1.6473e-05 deg
i 21.08041631390368 4.8138e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1545  
   data-arc span      11725 days (32.10 yr)  
   first obs. used      1987-10-23  
   last obs. used      2019-11-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43294  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 01:40:57  

Additional Information
 Jupiter MOID = 2.22469 au 
 T_jup = 3.384 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.405644685776126E-15 -3.415128189982076E-15 -3.151832462331733E-13 6.270781847778674E-15 -7.660029213174653E-14 2.927678756324446E-15
q -3.415128189982076E-15 8.361506153537016E-15 7.865832825548266E-13 -1.525746480550125E-14 1.87694868636316E-13 -6.13267633925117E-15
tp -3.151832462331733E-13 7.865832825548266E-13 1.761749127224718E-9 -4.591309289841991E-12 4.288380401545865E-10 1.668631664460274E-12
node 6.270781847778674E-15 -1.525746480550125E-14 -4.591309289841991E-12 1.802123646363807E-10 -1.683111856353493E-10 1.288485667737879E-11
peri -7.660029213174653E-14 1.87694868636316E-13 4.288380401545865E-10 -1.683111856353493E-10 2.713539525432016E-10 -1.164236010037107E-11
i 2.927678756324446E-15 -6.13267633925117E-15 1.668631664460274E-12 1.288485667737879E-11 -1.164236010037107E-11 2.317235208576231E-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 13.1   n/a MPO395272  
diameter diameter 6.178 km 0.184 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.320   0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

27708 (1987 WP)          Discovered 1987-Nov-20 by Alu, J., Helin, E. F. at Palomar
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1987 WP = 1985 KF1 = 1998 VX 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jul-04 00:47 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin