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 ]  
11904 (1991 TR1)
Classification: Inner Main-belt Asteroid          SPK-ID: 2011904
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09923339787851913 4.5919e-08  
a 1.920875064234069 5.8027e-09 au
q 1.730260104710004 8.7271e-08 au
i 19.6305387979997 6.5438e-06 deg
node 223.6388797747659 1.0608e-05 deg
peri 145.6711159684379 3.2527e-05 deg
M 290.6976731427409 3.0536e-05 deg
tp 2459187.694213927060
(2020-Dec-04.19421393)		 8.2799e-05 TDB
period 972.4048249136498
2.66		 4.4062e-06
1.206e-08		 d
yr
n .370216180315609 1.6775e-09 deg/d
Q 2.111490023758134 6.3785e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1183  
   data-arc span      10065 days (27.56 yr)  
   first obs. used      1991-10-13  
   last obs. used      2019-05-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4751  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:58:22  

Additional Information
 Earth MOID = .753424 au 
 Jupiter MOID = 3.22765 au 
 T_jup = 3.848 
[ 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 15.0   n/a MPO358745  
rotation period rot_per 18.233 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2013). Minor Planet Bull. 40, 26-29.]

11904 (1991 TR1)          Discovered 1991-Oct-13 by Lawrence, K. J. at Palomar
Reference: 19991026/Numbers.arcLast Updated: 2004-04-19
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Apr-02 16:06 UT
(server date/time)   		NASA Home Page
Site Manager:   Ryan S. Park
Webmaster:   Alan B. Chamberlin