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127005 Pratchett (2002 GY1)
Classification: Main-belt Asteroid          SPK-ID: 2127005
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2045445608726948 3.9387e-08  
a 2.359242652089684 1.2921e-08 au
q 1.876672399825867 9.465e-08 au
i 7.279845789205758 4.6662e-06 deg
node 128.2742191415689 3.6397e-05 deg
peri 143.6768358505083 3.9595e-05 deg
M 38.59377235002858 2.0911e-05 deg
tp 2459254.603372511166
(2021-Feb-09.10337251)
7.5974e-05 TDB
period 1323.601783020379
3.62
1.0874e-05
2.977e-08
d
yr
n .2719851277160582 2.2344e-09 deg/d
Q 2.8418129043535 1.5564e-08 au
  Orbit Determination Parameters
   # obs. used (total)      485  
   data-arc span      8060 days (22.07 yr)  
   first obs. used      1999-07-14  
   last obs. used      2021-08-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55704  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 02:35:05  

Additional Information
 Earth MOID = .865936 au 
 Jupiter MOID = 2.29122 au 
 T_jup = 3.513 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457177.5 (2015-Jun-04.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2048343299918023 3.9379e-08  
q 1.874995787137089 9.4489e-08 au
tp 2456608.006626696434
(2013-Nov-11.50662670)
6.0408e-05 TDB
node 128.3123020639736 3.6383e-05 deg
peri 143.5787654503657 3.9565e-05 deg
i 7.281934972835254 4.668e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      485  
   data-arc span      8060 days (22.07 yr)  
   first obs. used      1999-07-14  
   last obs. used      2021-08-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55704  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 02:35:05  

Additional Information
 Jupiter MOID = 2.29122 au 
 T_jup = 3.513 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.550737820071699E-15 -3.699366774552791E-15 -2.950609438485538E-13 -7.494096067175562E-15 -4.033002746882588E-14 -1.29447885633517E-16
q -3.699366774552791E-15 8.928099528297814E-15 1.07652221841784E-12 1.328553643027321E-14 1.974969261030708E-13 9.631892676494727E-16
tp -2.950609438485538E-13 1.07652221841784E-12 3.649081670774232E-9 -2.526645932251246E-11 9.597545172326569E-10 4.010764021940847E-12
node -7.494096067175562E-15 1.328553643027321E-14 -2.526645932251246E-11 1.323705301689303E-9 -1.318969575742508E-9 2.203099168219121E-11
peri -4.033002746882588E-14 1.974969261030708E-13 9.597545172326569E-10 -1.318969575742508E-9 1.565364182389559E-9 -2.081791281235782E-11
i -1.29447885633517E-16 9.631892676494727E-16 4.010764021940847E-12 2.203099168219121E-11 -2.081791281235782E-11 2.179037954914624E-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 16.46   n/a MPO637592  
diameter diameter 1.224 km 0.275 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.390   0.127 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

127005 Pratchett           Discovered 2002 Apr. 1 by J. Dellinger and W. G. Dillon at Needville.
Terence David John ("Terry") Pratchett (b. 1948) is a popular English author known for his richly detailed and allegorical "Discworld" series of satirical fantasy novels.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20091202/MPCPages.arcLast Updated: 2010-04-12

Alternate Designations
 2002 GY1 = 1999 NV29 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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