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30857 Parsec (1991 YY)
Classification: Main-belt Asteroid          SPK-ID: 2030857
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1600162818771594 3.1742e-08  
a 2.217374969900894 6.7583e-09 au
q 1.862558871689875 7.165e-08 au
i 3.492223786255657 4.0371e-06 deg
node 207.2592650168141 5.4716e-05 deg
peri 225.2803493551161 5.6372e-05 deg
M 243.4705255385754 1.4479e-05 deg
tp 2459390.882575707147
(2021-Jun-25.38257571)
4.9499e-05 TDB
period 1206.027298278909
3.30
5.5138e-06
1.51e-08
d
yr
n .2985007060070257 1.3647e-09 deg/d
Q 2.572191068111914 7.8398e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1579  
   data-arc span      10441 days (28.59 yr)  
   first obs. used      1991-12-31  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49771  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 02:44:46  

Additional Information
 Earth MOID = .87908 au 
 Jupiter MOID = 2.69178 au 
 T_jup = 3.633 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456912.5 (2014-Sep-12.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1604975663215538 3.186e-08  
q 1.86057338212236 7.1974e-08 au
tp 2456979.653234849834
(2014-Nov-18.15323485)
4.3718e-05 TDB
node 207.3725393897704 5.4692e-05 deg
peri 225.1403484063709 5.6331e-05 deg
i 3.493098674238652 4.039e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1579  
   data-arc span      10441 days (28.59 yr)  
   first obs. used      1991-12-31  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49771  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 02:44:46  

Additional Information
 Jupiter MOID = 2.69178 au 
 T_jup = 3.633 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.01503542083566E-15 -2.286347904056813E-15 -3.83399930023824E-13 5.479573795527383E-15 -1.333338931912241E-13 -1.217459994270432E-15
q -2.286347904056813E-15 5.180189336844673E-15 9.477564986242167E-13 -1.282530386783719E-14 3.246962063796944E-13 2.807876898506251E-15
tp -3.83399930023824E-13 9.477564986242167E-13 1.911280575869727E-9 -6.091886143974822E-12 5.975165985889139E-10 5.549158208473564E-13
node 5.479573795527383E-15 -1.282530386783719E-14 -6.091886143974822E-12 2.991191243500872E-9 -2.987039153216978E-9 -1.884239175782766E-11
peri -1.333338931912241E-13 3.246962063796944E-13 5.975165985889139E-10 -2.987039153216978E-9 3.173158906830206E-9 1.897561926591377E-11
i -1.217459994270432E-15 2.807876898506251E-15 5.549158208473564E-13 -1.884239175782766E-11 1.897561926591377E-11 1.631337968964818E-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 15.0   n/a MPO381501  

30857 Parsec           Discovered 1991 Dec. 31 by E. W. Elst at Haute Provence.
To the nearest integer, the number of this minor planet represents one parsec in units of a trillion meters. The name was suggested by A. Nakamura.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080321/MPCPages.arcLast Updated: 2008-03-26

[ show close-approach data ]
Alternate Designations
 1991 YY = 1996 HK12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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