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1212 Francette (1931 XC)
Classification: Outer Main-belt Asteroid          SPK-ID: 2001212
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1899989155087543 3.1893e-08  
a 3.948042952584022 2.1693e-08 au
q 3.197919073211078 1.2207e-07 au
i 7.592083418107335 3.5367e-06 deg
node 149.5635925291751 3.1079e-05 deg
peri 348.2017143348455 3.2852e-05 deg
M 98.16305144808879 1.0884e-05 deg
tp 2458615.201879322591
(2019-May-11.70187932)
8.544e-05 TDB
period 2865.30745830175
7.84
2.3615e-05
6.465e-08
d
yr
n .1256409670651434 1.0355e-09 deg/d
Q 4.698166831956966 2.5814e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3377  
   data-arc span      32757 days (89.68 yr)  
   first obs. used      1931-12-03  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43006  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:26:47  

Additional Information
 Earth MOID = 2.21257 au 
 Jupiter MOID = .350634 au 
 T_jup = 3.013 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456950.5 (2014-Oct-20.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1918992556466184 3.1884e-08  
q 3.195113904064816 1.2262e-07 au
tp 2455741.663270801910
(2011-Jun-29.16327080)
8.4474e-05 TDB
node 149.5898216651219 3.1076e-05 deg
peri 348.0544067675197 3.2808e-05 deg
i 7.590606183760471 3.5363e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3377  
   data-arc span      32757 days (89.68 yr)  
   first obs. used      1931-12-03  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43006  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:26:47  

Additional Information
 Jupiter MOID = .350634 au 
 T_jup = 3.013 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.016615060063462E-15 -3.871935028275104E-15 5.684428251304627E-14 4.023343131104076E-16 -7.397543421688813E-15 -1.235037270694344E-16
q -3.871935028275104E-15 1.503538339322981E-14 -4.182954134228002E-13 -1.296534866805439E-15 2.350620876815363E-14 7.347212470649884E-16
tp 5.684428251304627E-14 -4.182954134228002E-13 7.135851132050937E-9 -4.124658633828462E-12 9.203541051935053E-10 -2.151398938172016E-12
node 4.023343131104076E-16 -1.296534866805439E-15 -4.124658633828462E-12 9.657322660827817E-10 -9.575863346917924E-10 9.928411877807309E-12
peri -7.397543421688813E-15 2.350620876815363E-14 9.203541051935053E-10 -9.575863346917924E-10 1.076365630680688E-9 -1.010330110551403E-11
i -1.235037270694344E-16 7.347212470649884E-16 -2.151398938172016E-12 9.928411877807309E-12 -1.010330110551403E-11 1.250516087713481E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.63   n/a MPO636079 IRAS observations used: 15
diameter diameter 76.387 km 0.510 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
rotation period rot_per 32.78 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Warner, B.D.; Stephens, R.D. (2020) Minor Planet Bull. 47, 196-199.]
geometric albedo albedo 0.046   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[hildas] (http://adsabs.harvard.edu/abs/2012ApJ...744..197G)  
B-V BV 0.693   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=4.42, mean=7.63, max.=12.48) deg.
U-B UB 0.215   0.044 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=4.42, mean=7.63, max.=12.48) deg.
Tholen spectral type spec_T P   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B X   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

1212 Francette (1931 XC)          Discovered 1931-Dec-03 by Boyer, L. at Algiers
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1931 XC = 1949 HB1 = 1949 HZ = 1965 JB = A918 KA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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