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19918 (1977 PB)
Classification: Main-belt Asteroid          SPK-ID: 2019918
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1341961155865328 1.3481e-08  
a 2.646671109289805 9.9236e-09 au
q 2.291498127188014 3.3223e-08 au
i 13.55079505090966 5.1731e-07 deg
node 132.1568814042847 2.5693e-06 deg
peri 112.4458627477005 6.0201e-06 deg
M 127.1554581717604 6.2835e-06 deg
tp 2458841.004048341201
(2019-Dec-23.50404834)
2.6246e-05 TDB
period 1572.709071812226
4.31
8.8452e-06
2.422e-08
d
yr
n .2289043831769683 1.2874e-09 deg/d
Q 3.001844091391597 1.1255e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2404  
   data-arc span      15863 days (43.43 yr)  
   first obs. used      1977-08-06  
   last obs. used      2021-01-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44347  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 04:55:28  

Additional Information
 Earth MOID = 1.31634 au 
 Jupiter MOID = 2.17814 au 
 T_jup = 3.340 
[ 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 13.00   n/a E2021B10  
diameter diameter 7.546 km 0.117 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 7.6897 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Clark, M. (2016) Minor Planet Bull. 43, 2-5.]
geometric albedo albedo 0.200   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

19918 (1977 PB)          Discovered 1977-Aug-06 by Lagerkvist, C.-I. at Mount Stromlo
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1977 PB = 1990 KE2 = 1990 SO18 = 1998 KV60 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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