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11961 (1994 PO)
Classification: Main-belt Asteroid          SPK-ID: 2011961
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .103334831058037 5.041e-08  
a 2.572328558516891 1.232e-08 au
q 2.306517421496784 1.241e-07 au
i 12.349310351838 5.0069e-06 deg
node 317.105492259015 1.8715e-05 deg
peri 242.9667105679127 2.7936e-05 deg
M 194.5827097424416 2.253e-05 deg
tp 2459692.915031690879
(2022-Apr-23.41503169)
9.5428e-05 TDB
period 1506.912675335198
4.13
1.0825e-05
2.964e-08
d
yr
n .2388990456397359 1.7162e-09 deg/d
Q 2.838139695536998 1.3593e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1825  
   data-arc span      12362 days (33.85 yr)  
   first obs. used      1986-09-29  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44115  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:29:09  

Additional Information
 Earth MOID = 1.33582 au 
 Jupiter MOID = 2.23259 au 
 T_jup = 3.389 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.1   n/a MPO347619  
diameter diameter 7.221 km 0.118 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.196   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11961 (1994 PO)          Discovered 1994-Aug-03 by Shimizu, Y., Urata, T. at Nachi-Katsuura
Reference: 19991026/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1994 PO = 1986 SF1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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