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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 65 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1759600335065424 1.9547e-08  
a 3.162856798474741 1.0475e-08 au
q 2.60632041023873 6.0833e-08 au
i 1.086439448940182 1.0486e-06 deg
node 174.52769230 5.6787e-05 deg
peri 232.5028756750919 5.9827e-05 deg
M 125.0360105309547 7.6892e-06 deg
tp 2458682.907415407886
(2019-Jul-18.40741541)
4.1728e-05 TDB
period 2054.554758763378
5.63
1.0206e-05
2.794e-08
d
yr
n .1752204454344558 8.7044e-10 deg/d
Q 3.719393186710752 1.2318e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3405  
   data-arc span      27659 days (75.73 yr)  
   first obs. used      1945-10-15  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43859  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:58:03  

Additional Information
 Earth MOID = 1.61576 au 
 Jupiter MOID = 1.67525 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 11.00   n/a MPO636087  
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. 2020-October); 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.]
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
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

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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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