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1461 Jean-Jacques (1937 YL)
Classification: Main-belt Asteroid          SPK-ID: 2001461
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04517011964105531 5.8089e-08  
a 3.125536232357451 2.3377e-08 AU
q 2.984355386799411 1.8364e-07 AU
i 15.32958673272897 6.5612e-06 deg
node 104.8144905626512 2.6082e-05 deg
peri 335.8389880830162 7.3756e-05 deg
M 4.846018611302089 7.0294e-05 deg
tp 2456973.331365548313
(2014-Nov-11.83136555)
0.00039407 JED
period 2018.297738229169
5.53
2.2643e-05
6.199e-08
d
yr
n .1783681332942779 2.0011e-09 deg/d
Q 3.26671707791549 2.4433e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1007  
   data-arc span      28633 days (78.39 yr)  
   first obs. used      1935-08-02  
   last obs. used      2013-12-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56049  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 17:30:51  

Additional Information
 Earth MOID = 2.00573 AU 
 T_jup = 3.158 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.01 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
diameter diameter 32.94 km 1.4 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
rotation period rot_per 16.56 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.1613   0.014 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
B-V BV .715 mag .018 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=5.09, mean=9.76, max.=19.07) deg.
U-B UB .210 mag .035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=3; phase (min.=5.09, mean=9.76, max.=19.07) deg.
Tholen spectral type spec_T M   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

1461 Jean-Jacques (1937 YL)          Discovered 1937-Dec-30 by Laugier, M. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1937 YL = 1935 OH = 1939 GH 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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