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JPL Small-Body Database Browser
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19967 (1987 SN12)
Classification: Main-belt Asteroid          SPK-ID: 2019967
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2157222704096382 3.2585e-08  
a 2.565030350668198 1.1314e-08 au
q 2.011696179752424 8.452e-08 au
i 1.549576919976096 3.4075e-06 deg
node 144.8111417489457 0.00018783 deg
peri 183.5321722804599 0.00018826 deg
M 358.441260811008 1.3557e-05 deg
tp 2459006.996929330873
(2020-Jun-06.49692933)
5.6514e-05 TDB
period 1500.504109752189
4.11
9.9277e-06
2.718e-08
d
yr
n .2399193695373848 1.5874e-09 deg/d
Q 3.118364521583972 1.3755e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1680  
   data-arc span      14421 days (39.48 yr)  
   first obs. used      1979-11-16  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48645  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:47:44  

Additional Information
 Earth MOID = 1.00041 au 
 Jupiter MOID = 2.23651 au 
 T_jup = 3.399 
[ 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 14.1   n/a MPO474028  
diameter diameter 3.979 km 1.267 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.04 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:
[Chang, C.-H.; Lin, H.-W.; Ip, W.-H.; Chen, W.-P.; et al. (2019) ArXiv:1901.08719.]
geometric albedo albedo 0.233   0.148 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19967 (1987 SN12)          Discovered 1987-Sep-16 by Debehogne, H. at La Silla
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1987 SN12 = 1979 WP1 = 1991 PH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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