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 ]  
17694 Jiranek (1997 ET1)
Classification: Main-belt Asteroid          SPK-ID: 2017694
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08466416983464424 2.917e-08  
a 2.844423404004724 1.0679e-08 au
q 2.603602657846431 8.5689e-08 au
i 3.190715467431723 3.2516e-06 deg
node 84.6350432872177 5.9745e-05 deg
peri 305.4502595590426 6.3199e-05 deg
M 56.93569069456274 2.0032e-05 deg
tp 2458923.377438477578
(2020-Mar-14.87743848)
9.7441e-05 TDB
period 1752.224675437183
4.80
9.8678e-06
2.702e-08
d
yr
n .2054531048709147 1.157e-09 deg/d
Q 3.085244150163017 1.1583e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2221  
   data-arc span      14381 days (39.37 yr)  
   first obs. used      1981-11-03  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51457  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:35:31  

Additional Information
 Earth MOID = 1.60932 au 
 Jupiter MOID = 2.29499 au 
 T_jup = 3.300 
[ 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 13.68   n/a E2021B10  
rotation period rot_per 4.65 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

17694 Jiránek           Discovered 1997 Mar. 4 by M. Tichy and Z. Moravec at Klet.
Vladimír Jiránek (b. 1938) is a Czech graphic artist, illustrator and cartoonist. His newspaper and journal cartoons comment on the situation in the modern Czech Republic. Two rabbits named Bob and Bobek belong to the most popular characters of his animated cartoons.
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 ET1 = 1981 VJ2 = 1986 WN9 = 1997 XE9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-May-09 17:52 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin