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 ]  
128P/Shoemaker-Holt 1
Classification: Jupiter-family Comet          SPK-ID: 1003475
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2456670.5 (2014-Jan-13.0) TDB
Reference: JPL K172/11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3220169800985928 1.478e-07  
a 4.505097130049611 1.1983e-07 au
q 3.054379357180198 6.4808e-07 au
i 4.363311993562433 1.8741e-05 deg
node 214.3433433088412 0.00014507 deg
peri 210.4973348075075 0.00020308 deg
M 247.3261214294736 7.3957e-05 deg
tp 2457763.639049540296
(2017-Jan-10.13904954)
0.0006873 TDB
period 3492.646768063308
9.56
0.00013935
3.815e-07
d
yr
n .1030736927913332 4.1124e-09 deg/d
Q 5.955814902919024 1.5842e-07 au
  Orbit Determination Parameters
   # obs. used (total)      699  
   data-arc span      4229 days (11.58 yr)  
   first obs. used      2006-08-22  
   last obs. used      2018-03-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .74955  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2021-Feb-01 11:40:56  

Additional Information
 Earth MOID = 2.06861 au 
 Jupiter MOID = .152613 au 
 T_jup = 2.912 
[ 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
comet total magnitude M1 6.8   0.6 K172/11 2 parameter fit from 377 observations, autocmod 2.9a
comet total magnitude slope K1 19.5   n/a K172/11 autocmod 2.9a
comet nuclear magnitude M2 14.2   0.5 K172/11 from 307 observations, autocmod 2.9a
comet nuclear magnitude slope K2 5.   n/a K172/11 autocmod 2.9a
comet nuclear phase coefficient PC 0.03   n/a K172/11 autocmod 2.9a

128P/Shoemaker-Holt 1          Discovered 1987-Oct-18 by Shoemaker, Carolyn & Eugene, & Holt, Henry at Palomar Mountain Observatory, California
discovered on plate/photo taken on discovery date as well as 10/19
Reference: comet.disLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-19 20:15 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin