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1215 Boyer (1932 BA)
Classification: Main-belt Asteroid          SPK-ID: 2001215
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1329584481008544 1.7008e-08  
a 2.578432838970123 8.6237e-09 au
q 2.235608410168375 4.4029e-08 au
i 15.91790169567267 9.7296e-07 deg
node 123.7268887950486 4.365e-06 deg
peri 265.6188569313163 1.2236e-05 deg
M 251.0706128121253 1.2857e-05 deg
tp 2459658.088100399446
(2022-Mar-19.58810040)
5.5306e-05 TDB
period 1512.279839229073
4.14
7.5868e-06
2.077e-08
d
yr
n .2380511798553897 1.1943e-09 deg/d
Q 2.921257267771871 9.7702e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2971  
   data-arc span      32397 days (88.70 yr)  
   first obs. used      1932-01-19  
   last obs. used      2020-09-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37133  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:09:34  

Additional Information
 Earth MOID = 1.30393 au 
 Jupiter MOID = 2.58048 au 
 T_jup = 3.360 
[ 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 11.10   n/a E2021B10  
diameter diameter 13.041 km 0.106 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 11.567 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Polakis, T. (2020) Minor Planet Bull. 47, 314-321.]
geometric albedo albedo 0.116   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.900   0.066 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=11.32, mean=18.04, max.=24.76) deg.
U-B UB 0.459   0.040 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=24.76 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

1215 Boyer (1932 BA)          Discovered 1932-Jan-19 by Schmitt, A. at Algiers
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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