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JPL Small-Body Database Browser
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1636 Porter (1950 BH)
Classification: Main-belt Asteroid          SPK-ID: 2001636
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1279218415864811 3.1111e-08  
a 2.234499176822298 5.0026e-09 au
q 1.948657927099713 6.8819e-08 au
i 4.434647972854288 3.5414e-06 deg
node 168.342716966954 4.1337e-05 deg
peri 239.5652721077708 4.3671e-05 deg
M 98.34971177149937 1.3992e-05 deg
tp 2458667.196928305695
(2019-Jul-02.69692831)
4.7152e-05 TDB
period 1220.024986842119
3.34
4.0971e-06
1.122e-08
d
yr
n .2950759237577703 9.9093e-10 deg/d
Q 2.520340426544882 5.6425e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2721  
   data-arc span      25579 days (70.03 yr)  
   first obs. used      1950-01-23  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45325  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:00:25  

Additional Information
 Earth MOID = .962536 au 
 Jupiter MOID = 2.82756 au 
 T_jup = 3.625 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.2   n/a MPO445272  
diameter diameter 8.370 km 0.105 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 2.9658 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Albers, K.; Kragh, K.; Monnier, A.; Pligge, Z.; et al. (2010) Minor Planet Bull. 37, 152-158.]
[Behrend, R. (2014) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.145   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a medium resolution spectrum published by Chapman and Gaffey (1979)

1636 Porter (1950 BH)          Discovered 1950-Jan-23 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1950 BH = 1972 YT1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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