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 ]  
99P/Kowal 1
Classification: Jupiter-family Comet          SPK-ID: 1000055
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2455252.5 (2010-Feb-25.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2291373515446991 1.3815e-07  
a 6.149534548368715 1.3353e-07 au
q 4.74044648872288 8.8439e-07 au
i 4.33247291940317 1.1774e-05 deg
node 28.21390057697362 0.00012231 deg
peri 174.5495918716858 0.00015361 deg
M 72.59347763271346 5.7728e-05 deg
tp 2454129.300512193236
(2007-Jan-28.80051219)
0.00089097 TDB
period 5570.08465218118
15.25
0.00018143
4.967e-07
d
yr
n .06463097465835249 2.1051e-09 deg/d
Q 7.55862260801455 1.6413e-07 au
  Orbit Determination Parameters
   # obs. used (total)      862  
   data-arc span      16040 days (43.92 yr)  
   first obs. used      1977-04-24  
   last obs. used      2021-03-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .69764  
   source      ORB  
   producer      Shantanu Naidu  
   solution date      2021-Mar-31 15:57:15  

Additional Information
 Earth MOID = 3.7381 au 
 Jupiter MOID = .305991 au 
 T_jup = 2.956 
[ 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 6.9   0.7 26 from 609 observations, assumed slope, autocmod 2.9b
comet total magnitude slope K1 12.25   n/a 26 autocmod 2.9b
comet nuclear magnitude M2 11.5   0.8 26 from 151 observations, autocmod 2.9b
comet nuclear magnitude slope K2 5.   n/a 26 autocmod 2.9b
comet nuclear phase coefficient PC 0.03   n/a 26 autocmod 2.9b
diameter diameter 10.2 km n/a Scotti,J (1994) BAAS 26:1375  

99P/Kowal 1          Discovered 1977-Apr-24 by Kowal, Charles T. at Palomar Mountain Observatory, California
discovered on plate/photo taken on discovery date as well as 4/25
Reference: comet.disLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1991.8   99P/1991 D2   1992 VI   1991i 
 1976.6   99P/1977 H2   1977 III   1977f 
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-18 13:19 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin