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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04711703291061331 5.1347e-08  
a 3.128348717324079 2.0299e-08 au
q 2.980950207854046 1.5765e-07 au
i 15.3068369728814 5.6101e-06 deg
node 104.6966810928969 2.2843e-05 deg
peri 336.12031641 6.5749e-05 deg
M 111.4450495020187 6.1379e-05 deg
tp 2456974.852887614833
(2014-Nov-13.35288761)
0.00034507 JED
period 2021.022570900113
5.53
1.967e-05
5.385e-08
d
yr
n .1781276494302906 1.7337e-09 deg/d
Q 3.275747226794113 2.1255e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1428  
   data-arc span      29476 days (80.70 yr)  
   first obs. used      1935-08-02  
   last obs. used      2016-04-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49873  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:34:06  

Additional Information
 Earth MOID = 2.00091 au 
 Jupiter MOID = 1.90503 au 
 T_jup = 3.157 
[ 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 LCDB (Rev. 2016-February); Warner et al., 2009 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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