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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2155417755674176 3.1946e-08  
a 2.564537417610073 9.2304e-09 au
q 2.011772469109318 8.3089e-08 au
i 1.549639861006362 3.1892e-06 deg
node 144.8124991415652 0.00016551 deg
peri 183.5397130474813 0.0001659 deg
M 46.43483950840083 1.0915e-05 deg
tp 2459007.012267588559
(2020-Jun-06.51226759)
4.5738e-05 TDB
period 1500.071592914988
4.11
8.0987e-06
2.217e-08
d
yr
n .2399885456803006 1.2957e-09 deg/d
Q 3.117302366110828 1.122e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2327  
   data-arc span      15090 days (41.31 yr)  
   first obs. used      1979-11-16  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44763  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:10:24  

Additional Information
 Earth MOID = .998552 au 
 Jupiter MOID = 2.23766 au 
 T_jup = 3.400 
[ 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 14.14   n/a E2021B10  
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. 2020-October); 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) Ap. J. Supp. Ser. 241, A6.]
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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