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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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .103334837230701 4.5864e-08  
a 2.572328559793292 1.1504e-08 au
q 2.306517406763169 1.1364e-07 au
i 12.34931029738923 4.6986e-06 deg
node 317.1054921651989 1.8478e-05 deg
peri 242.9667094755798 2.7488e-05 deg
M 194.5827103440788 2.2434e-05 deg
tp 2459692.915029687874
(2022-Apr-23.41502969)
9.5176e-05 TDB
period 1506.912676456804
4.13
1.0109e-05
2.768e-08
d
yr
n .2388990454619216 1.6026e-09 deg/d
Q 2.838139712823416 1.2692e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1995  
   data-arc span      12451 days (34.09 yr)  
   first obs. used      1986-09-29  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42698  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:56:08  

Additional Information
 Earth MOID = 1.33582 au 
 Jupiter MOID = 2.23259 au 
 T_jup = 3.389 
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Orbital Elements at Epoch 2457101.5 (2015-Mar-20.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1026331551291604 4.5933e-08  
q 2.309205970394305 1.1374e-07 au
tp 2456679.671926407808
(2014-Jan-22.17192641)
9.1966e-05 TDB
node 317.1782626751611 1.8477e-05 deg
peri 243.2437739012791 2.7588e-05 deg
i 12.34730202958928 4.6992e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1995  
   data-arc span      12451 days (34.09 yr)  
   first obs. used      1986-09-29  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42698  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:56:08  

Additional Information
 Jupiter MOID = 2.23259 au 
 T_jup = 3.389 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.109861675570416E-15 -5.207337802099621E-15 -7.756093003936608E-13 -1.093073991940335E-14 -1.776615387163309E-13 -1.792986576510593E-16
q -5.207337802099621E-15 1.293732913415334E-14 2.061947530236749E-12 2.866209544991829E-14 4.729381504221273E-13 7.746649690324146E-16
tp -7.756093003936608E-13 2.061947530236749E-12 8.457826798232614E-9 1.558825159400011E-11 1.902159223355223E-9 8.172344858940294E-13
node -1.093073991940335E-14 2.866209544991829E-14 1.558825159400011E-11 3.413830425442339E-10 -3.292836938700307E-10 2.721201203243181E-11
peri -1.776615387163309E-13 4.729381504221273E-13 1.902159223355223E-9 -3.292836938700307E-10 7.611137246534674E-10 -2.641268920522528E-11
i -1.792986576510593E-16 7.746649690324146E-16 8.172344858940294E-13 2.721201203243181E-11 -2.641268920522528E-11 2.208254920893342E-11

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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