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9983 Rickfienberg (1995 DA)
Classification: Main-belt Asteroid          SPK-ID: 2009983
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1156394809353219 1.9256e-08  
a 2.706871905830053 9.4394e-09 au
q 2.39385064368146 5.3334e-08 au
i 8.314920809896917 9.8803e-07 deg
node 49.17879941144982 4.2834e-06 deg
peri 8.683344859053372 8.9645e-06 deg
M 11.3431832807103 7.1847e-06 deg
tp 2459149.245449109270
(2020-Oct-26.74544911)
3.244e-05 TDB
period 1626.671972411912
4.45
8.5088e-06
2.33e-08
d
yr
n .2213107535542141 1.1576e-09 deg/d
Q 3.019893167978646 1.0531e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2150  
   data-arc span      12352 days (33.82 yr)  
   first obs. used      1987-05-30  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48324  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 00:28:34  

Additional Information
 Earth MOID = 1.40537 au 
 Jupiter MOID = 2.32211 au 
 T_jup = 3.340 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457138.5 (2015-Apr-26.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1154878476109611 1.9021e-08  
q 2.394863245608113 5.2573e-08 au
tp 2457514.261412138891
(2016-May-05.76141214)
3.2897e-05 TDB
node 49.22692193034046 4.2796e-06 deg
peri 7.07685378980761 9.0103e-06 deg
i 8.321064878946457 9.8937e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2150  
   data-arc span      12352 days (33.82 yr)  
   first obs. used      1987-05-30  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48324  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 00:28:34  

Additional Information
 Jupiter MOID = 2.32211 au 
 T_jup = 3.340 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.617846469961429E-16 -9.873113650840147E-16 6.006241074847132E-15 1.741001878489998E-14 1.541214300386755E-14 -2.240050357982439E-15
q -9.873113650840147E-16 2.763869530366009E-15 -5.937194971118873E-14 -4.790330998910205E-14 -5.499560677558855E-14 6.06018300682478E-15
tp 6.006241074847132E-15 -5.937194971118873E-14 1.082231692430957E-9 9.563377642022766E-12 2.596928894918534E-10 -2.618928373389144E-13
node 1.741001878489998E-14 -4.790330998910205E-14 9.563377642022766E-12 1.831510390805583E-11 -1.451725580906817E-11 -2.320485904662785E-12
peri 1.541214300386755E-14 -5.499560677558855E-14 2.596928894918534E-10 -1.451725580906817E-11 8.118543487227124E-11 2.024594419659637E-12
i -2.240050357982439E-15 6.06018300682478E-15 -2.618928373389144E-13 -2.320485904662785E-12 2.024594419659637E-12 9.788590291761873E-13

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.41   n/a MPCxxxxx  
diameter diameter 7.444 km 0.280 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.2963 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Tatge, C.B.; Odden, C.; Arion, D.N.; Feinberg, R.T. (2012) Minor Planet Bull. 39, 135-136.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
geometric albedo albedo 0.167   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9983 Rickfienberg           Discovered 1995 Feb. 19 by D. di Cicco at Sudbury.
Trained as an astronomer at Rice and Harvard universities, Richard Tresch Fienberg (b. 1956) became editor of Sky & Telescope in 2000. As the fourth at the helm in the magazine's six-decade history, he says it's a dream job that conflicts with stargazing at his private observatory in New Hampshire.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030501/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1995 DA = 1987 KS2 = 1993 TS37 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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