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 ]  
17712 Fatherwilliam (1997 WK7)
Classification: Main-belt Asteroid          SPK-ID: 2017712
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08951148313097861 1.109e-08  
a 2.269341087593668 6.4119e-09 au
q 2.066209001113091 2.4055e-08 au
i 4.376586495639304 5.8102e-07 deg
node 42.8929497024573 6.9429e-06 deg
peri 109.1479168590248 1.4199e-05 deg
M 184.990581369692 1.0376e-05 deg
tp 2459807.525608117364
(2022-Aug-16.02560812)
3.6766e-05 TDB
period 1248.671189428237
3.42
5.2921e-06
1.449e-08
d
yr
n .2883064837628255 1.2219e-09 deg/d
Q 2.472473174074246 6.9858e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2605  
   data-arc span      13057 days (35.75 yr)  
   first obs. used      1985-03-22  
   last obs. used      2020-12-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44274  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:10:38  

Additional Information
 Earth MOID = 1.08098 au 
 Jupiter MOID = 2.51348 au 
 T_jup = 3.605 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.95   n/a E2021B10  
diameter diameter 4.419 km 0.177 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.273   0.068 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17712 Fatherwilliam           Discovered 1997 Nov. 19 by Y. Shimizu and T. Urata at the Nachi-Katsuura Observatory.
In Lewis Carroll's Alice's Adventures in Wonderland, Father William is a character in a poem that a Caterpillar tells Alice to repeat. He is rather old and in the end gets quite annoyed with a youth who, it emerges later in the poem, is his son, and who asks him one question after another.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010309/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1997 WK7 = 1985 FN1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-16 01:01 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin