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
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
20340 Susanruder (1998 HR91)
Classification: Main-belt Asteroid          SPK-ID: 2020340
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1473734523441842 4.7609e-08  
a 2.378093169759335 1.0346e-08 au
q 2.027625369335778 1.1465e-07 au
i 2.98739668271659 4.6195e-06 deg
node 137.874002838091 7.6518e-05 deg
peri 6.353555448971397 7.7812e-05 deg
M 66.08756913902376 1.3464e-05 deg
tp 2458754.599731925104
(2019-Sep-28.09973192)
4.9738e-05 TDB
period 1339.496938081362
3.67
8.7416e-06
2.393e-08
d
yr
n .2687576132242964 1.7539e-09 deg/d
Q 2.728560970182893 1.1871e-08 au
  Orbit Determination Parameters
   # obs. used (total)      921  
   data-arc span      9160 days (25.08 yr)  
   first obs. used      1993-12-09  
   last obs. used      2019-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57851  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:39:54  

Additional Information
 Earth MOID = 1.03998 au 
 Jupiter MOID = 2.27955 au 
 T_jup = 3.524 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456666.5 (2014-Jan-09.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1475502705522051 4.772e-08  
q 2.027620382456814 1.1506e-07 au
tp 2456075.810575522913
(2012-May-28.31057552)
4.9062e-05 TDB
node 137.8875516356871 7.6503e-05 deg
peri 6.512233515669813 7.7781e-05 deg
i 2.987307498975995 4.62e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      921  
   data-arc span      9160 days (25.08 yr)  
   first obs. used      1993-12-09  
   last obs. used      2019-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57851  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 23:39:54  

Additional Information
 Jupiter MOID = 2.27955 au 
 T_jup = 3.524 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.277216068601864E-15 -5.474490675680255E-15 7.908018618992713E-13 1.12204262051931E-14 2.765576066123089E-13 3.696565458160052E-16
q -5.474490675680255E-15 1.323827711002753E-14 -1.948719804578032E-12 -2.720757566663612E-14 -6.683346683022451E-13 -7.464754634461962E-16
tp 7.908018618992713E-13 -1.948719804578032E-12 2.4071250201677E-9 6.70348332354739E-12 6.992090737243836E-10 1.469471094954633E-12
node 1.12204262051931E-14 -2.720757566663612E-14 6.70348332354739E-12 5.852666125742351E-9 -5.842002031622651E-9 9.758149763844182E-11
peri 2.765576066123089E-13 -6.683346683022451E-13 6.992090737243836E-10 -5.842002031622651E-9 6.049920827016668E-9 -9.698773956556843E-11
i 3.696565458160052E-16 -7.464754634461962E-16 1.469471094954633E-12 9.758149763844182E-11 -9.698773956556843E-11 2.134450892580851E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.5   n/a MPO358825  

20340 Susanruder           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Susan Ruder mentored a finalist in the 2004 Intel Science Talent Search, a science competition for high school seniors. She teaches at the Carmel High School, Carmel, New York.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040415/MPCPages.arcLast Updated: 2004-04-20

[ 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 2020-Feb-18 01:07 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin