Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
1461 Jean-Jacques (1937 YL)
Classification: Main-belt Asteroid          SPK-ID: 2001461
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04858350392431834 4.0327e-08  
a 3.12661549998354 1.484e-08 au
q 2.974713563570256 1.3119e-07 au
i 15.31456105299653 4.0602e-06 deg
node 104.635593796974 1.6399e-05 deg
peri 334.6353508017971 4.5695e-05 deg
M 2.708619042844875 4.227e-05 deg
tp 2458985.306579128878
(2020-May-15.80657913)
0.00023711 TDB
period 2019.343225121515
5.53
1.4377e-05
3.936e-08
d
yr
n .1782757856720156 1.2693e-09 deg/d
Q 3.278517436396825 1.5561e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3641  
   data-arc span      30867 days (84.51 yr)  
   first obs. used      1935-08-02  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .33541  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:55:16  

Additional Information
 Earth MOID = 1.99695 au 
 Jupiter MOID = 1.89992 au 
 T_jup = 3.158 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456754.5 (2014-Apr-07.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04487929933870235 4.023e-08  
q 2.984450185865295 1.3016e-07 au
tp 2456972.837436326773
(2014-Nov-11.33743633)
0.00025895 TDB
node 104.8132775809799 1.6374e-05 deg
peri 335.7412323087977 4.91e-05 deg
i 15.33015848566433 4.0621e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3641  
   data-arc span      30867 days (84.51 yr)  
   first obs. used      1935-08-02  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .33541  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:55:16  

Additional Information
 Jupiter MOID = 1.89992 au 
 T_jup = 3.158 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.618419383590431E-15 -5.207965498015113E-15 -1.648615038451201E-12 -6.451133191000916E-15 -2.798281453661145E-13 -9.125206972108485E-16
q -5.207965498015113E-15 1.694043585301379E-14 4.649743058146329E-12 2.082932680056603E-14 7.783293494207255E-13 3.644289419758861E-15
tp -1.648615038451201E-12 4.649743058146329E-12 6.705534151232342E-8 2.646986249280471E-11 1.201743072810787E-8 -2.841186413869723E-12
node -6.451133191000916E-15 2.082932680056603E-14 2.646986249280471E-11 2.681135106366281E-10 -2.532075158552726E-10 -1.292470721163844E-11
peri -2.798281453661145E-13 7.783293494207255E-13 1.201743072810787E-8 -2.532075158552726E-10 2.410848749589732E-9 1.185011177258857E-11
i -9.125206972108485E-16 3.644289419758861E-15 -2.841186413869723E-12 -1.292470721163844E-11 1.185011177258857E-11 1.650049891866173E-11

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 10.1   n/a MPO502167 IRAS observations used: 8
diameter diameter 35.145 km 0.172 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 16.56 h n/a LCDB (Rev. 2019-August); 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 0.172   0.030 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.715   0.018 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=5.09, mean=9.76, max.=19.07) deg.
U-B UB 0.210   0.035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1902-Feb-05 21:35 00:02 Jupiter 1.93647585638033 1.93647549800251 1.93647621475881 4.77607517547919 4.68359753223396 2415786.399280932 2.24573363717988 212.202437001331 16.1540563330772 -88.9562708598964 4709588.27556085 T 38 CATAB v2.0f-lin.ifort 2020-Feb-22 15:55:36 2020-Feb-22 15:55
1984-Dec-23 00:40 < 00:01 Jupiter 1.9504512807248 1.9504509314114 1.95045163003821 4.80352486759849 4.71225117269227 2446057.527909111 0.608232500543876 71.3200319094222 16.3439848104652 89.2024680414723 4673889.83022823 T 38 CATAB v2.0f-lin.ifort 2020-Feb-22 15:55:36 2020-Feb-22 15:55
2067-Nov-09 18:25 00:01 Jupiter 1.95587419556108 1.95587385616496 1.9558745349572 4.8117927542204 4.72093397648785 2476329.267211596 1.06774041133851 108.891250510294 16.0285690747003 -89.6644550029189 4734252.62247738 T 38 CATAB v2.0f-lin.ifort 2020-Feb-22 15:55:36 2020-Feb-22 15:55
2150-Sep-28 05:35 00:03 Jupiter 1.96841849473428 1.96841795538845 1.96841903408593 4.82378181640841 4.73373623913038 2506601.732327440 2.69034993012952 236.431622184174 17.8964604401752 -85.3216792235201 4738428.63276172 T 38 CATAB v2.0f-lin.ifort 2020-Feb-22 15:55:36 2020-Feb-22 15:55

Alternate Designations
 1937 YL = 1935 OH = 1939 GH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Jun-05 23:49 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin