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1691 Oort (1956 RB)
Classification: Main-belt Asteroid          SPK-ID: 2001691
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1753978884441829 3.2222e-08  
a 3.162930486151748 1.3282e-08 au
q 2.608159157584998 1.0575e-07 au
i 1.086005601929283 3.764e-06 deg
node 174.5456454347044 0.00018101 deg
peri 232.6137495341703 0.00018134 deg
M 345.5132603480734 1.1798e-05 deg
tp 2458683.180111234696
(2019-Jul-18.68011123)
6.7646e-05 TDB
period 2054.626559160406
5.63
1.2942e-05
3.543e-08
d
yr
n .1752143222304636 1.1036e-09 deg/d
Q 3.717701814718497 1.5611e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2537  
   data-arc span      26974 days (73.85 yr)  
   first obs. used      1945-10-15  
   last obs. used      2019-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48839  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:19:30  

Additional Information
 Earth MOID = 1.61766 au 
 Jupiter MOID = 1.6731 au 
 T_jup = 3.180 
[ show covariance matrix ]

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 10.95   n/a PDS3 (MPC 17263)  
diameter diameter 33.644 km 0.267 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 10.2705 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Broz, M.; Durech, J.; Warner, B.D.; et al. (2013) Astron. Astrophys. 559, A134.]
geometric albedo albedo 0.065   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.682   0.025 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=.75 deg.
U-B UB 0.316   0.044 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=.75 deg.
Tholen spectral type spec_T CU   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

1691 Oort (1956 RB)          Discovered 1956-Sep-09 by Reinmuth, K. and Groeneveld, I. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1956 RB = 1945 TD = 1947 DA = 1950 PZ = 1950 RU = 1951 XW = 1955 MW = 1956 SD = 1964 DA = A917 TD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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