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19339 (1997 AF4)
Classification: Main-belt Asteroid          SPK-ID: 2019339
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .160411770423748 3.2343e-08  
a 2.77181450644349 1.1872e-08 au
q 2.327182834178662 9.0984e-08 au
i 8.883138600214505 3.7161e-06 deg
node 130.8735485224744 2.6606e-05 deg
peri 12.24020889009699 3.0048e-05 deg
M 52.87380410494148 1.3064e-05 deg
tp 2458952.938714724277
(2020-Apr-13.43871472)
6.0957e-05 TDB
period 1685.561767456241
4.61
1.0829e-05
2.965e-08
d
yr
n .2135786459746845 1.3721e-09 deg/d
Q 3.216446178708317 1.3776e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2155  
   data-arc span      15302 days (41.89 yr)  
   first obs. used      1979-04-28  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45393  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:53:01  

Additional Information
 Earth MOID = 1.34076 au 
 Jupiter MOID = 1.80715 au 
 T_jup = 3.301 
[ 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 13.85   n/a E2021B10  
diameter diameter 8.985 km 2.922 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  
rotation period rot_per 256.172 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:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.038   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  

19339 (1997 AF4)          Discovered 1997-Jan-06 by Kobayashi, T. at Oizumi
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1997 AF4 = 1979 HW5 = 1998 MD19 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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