Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
19918 (1977 PB)
Classification: Main-belt Asteroid          SPK-ID: 2019918
[ 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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1340317455761135 2.7214e-08  
a 2.649082093845174 1.0261e-08 au
q 2.294020996632679 7.0079e-08 au
i 13.54735056941216 4.2235e-06 deg
node 132.1565027817047 1.2574e-05 deg
peri 112.8834148517323 2.1232e-05 deg
M 36.15480237714739 1.5962e-05 deg
tp 2458842.336945454707
(2019-Dec-24.83694545)		 6.9802e-05 TDB
period 1574.858549698366
4.31		 9.1502e-06
2.505e-08		 d
yr
n .2285919583501332 1.3282e-09 deg/d
Q 3.004143191057668 1.1636e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2308  
   data-arc span      15808 days (43.28 yr)  
   first obs. used      1977-08-06  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44085  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:12:22  

Additional Information
 Earth MOID = 1.31831 au 
 Jupiter MOID = 2.1791 au 
 T_jup = 3.339 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457630.5 (2016-Aug-30.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .132934698287758 2.727e-08  
q 2.296397073225841 7.0043e-08 au
tp 2457267.608270471447
(2015-Sep-02.10827047)		 7.0695e-05 TDB
node 132.1919530175369 1.2583e-05 deg
peri 112.7214651411252 2.1338e-05 deg
i 13.54238038916723 4.2221e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      2308  
   data-arc span      15808 days (43.28 yr)  
   first obs. used      1977-08-06  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44085  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:12:22  

Additional Information
 Jupiter MOID = 2.1791 au 
 T_jup = 3.339 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.436310918413321E-16 -1.895932858136946E-15 1.725004334693481E-13 -1.042068905455097E-15 3.527730974482619E-14 -7.76524895813545E-16
q -1.895932858136946E-15 4.906003586706158E-15 -5.20113583035745E-13 2.171834425632567E-15 -1.038891958324381E-13 1.778820714527314E-15
tp 1.725004334693481E-13 -5.20113583035745E-13 4.997798478815051E-9 -1.714487836707009E-11 1.224134959218476E-9 3.957500334353081E-12
node -1.042068905455097E-15 2.171834425632567E-15 -1.714487836707009E-11 1.583207327409337E-10 -1.577544343171562E-10 3.921587821343664E-12
peri 3.527730974482619E-14 -1.038891958324381E-13 1.224134959218476E-9 -1.577544343171562E-10 4.553142936747873E-10 -2.91486693640768E-12
i -7.76524895813545E-16 1.778820714527314E-15 3.957500334353081E-12 3.921587821343664E-12 -2.91486693640768E-12 1.782598188912051E-11

[ 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 13.1   n/a MPO474028  
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

[ show close-approach data ]
Alternate Designations
 1977 PB = 1990 KE2 = 1990 SO18 = 1998 KV60 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Jan-27 20:59 UT
(server date/time)   		NASA Home Page
Site Manager:   Ryan S. Park
Webmaster:   Alan B. Chamberlin