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11500 Tomaiyowit (1989 UR)
Classification: Apollo [NEO, PHA]          SPK-ID: 2011500
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 210 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3558396834814775 3.6393e-08  
a 1.079754280646306 6.9026e-10 au
q .695534859183354 3.8982e-08 au
i 10.30840331350982 3.2943e-06 deg
node 234.4202457594378 1.1378e-05 deg
peri 289.4703931581896 1.2063e-05 deg
M 173.9211281057443 5.9463e-06 deg
tp 2459002.513457485580
(2020-Jun-02.01345749)
6.6732e-06 TDB
period 409.813092184268
1.12
3.9298e-07
1.076e-09
d
yr
n .8784492415340648 8.4236e-10 deg/d
Q 1.463973702109258 9.3588e-10 au
  Orbit Determination Parameters
   # obs. used (total)      1199  
   # delay obs. used      0  
   # Doppler obs. used      1  
   data-arc span      10889 days (29.81 yr)  
   first obs. used      1989-10-25  
   last obs. used      2019-08-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42607  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 22:48:32  

Additional Information
 Earth MOID = .0341646 au 
 Jupiter MOID = 3.54442 au 
 T_jup = 5.657 
[ 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
absolute magnitude H 18.3   n/a MPO435808  
diameter diameter 0.738 km 0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  
rotation period rot_per 73.0 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (1998) http://www.asu.cas.cz/~ppravec/neo.htm]
geometric albedo albedo 0.142   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

11500 Tomaiyowit           Discovered 1989 Oct. 28 by J. E. Mueller and J. D. Mendenhall at Palomar.
Tomaiyowit is Earth Mother in the Luiseno creation story. She, together with Tukmit, gave birth to the First People, which are all things and features of the earth forming the basis of Luiseno existence.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20081113/MPCPages.arcLast Updated: 2008-11-17

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