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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .134114108815283 1.3484e-08  
a 2.647707839926261 1.0008e-08 au
q 2.292612862571312 3.3299e-08 au
i 13.55066491033963 5.1725e-07 deg
node 132.1566149820549 2.5688e-06 deg
peri 112.6165193739662 6.0087e-06 deg
M 82.12348675462988 6.1776e-06 deg
tp 2458841.521533228087
(2019-Dec-24.02153323)		 2.6265e-05 TDB
period 1573.633233864162
4.31		 8.9224e-06
2.443e-08		 d
yr
n .228769952396084 1.2971e-09 deg/d
Q 3.002802817281208 1.135e-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-Apr-13 03:09:07  

Additional Information
 Earth MOID = 1.31564 au 
 Jupiter MOID = 2.17877 au 
 T_jup = 3.340 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457578.5 (2016-Jul-09.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1329126163605149 1.3521e-08  
q 2.29637192830991 3.3303e-08 au
tp 2457267.558123874582
(2015-Sep-02.05812387)		 2.5066e-05 TDB
node 132.1924896742694 2.5708e-06 deg
peri 112.7075978374112 6.056e-06 deg
i 13.5426633535796 5.1685e-07 deg
   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-Apr-13 03:09:07  

Additional Information
 Jupiter MOID = 2.17877 au 
 T_jup = 3.340 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.828147432040331E-16 -4.374267634499066E-16 -7.442566718994487E-14 -1.712374400569955E-14 7.172175873493501E-15 -1.107483631518082E-15
q -4.374267634499066E-16 1.109115437412715E-15 1.947932523136621E-13 4.418402714767178E-14 -1.675358721080526E-14 2.746968964389744E-15
tp -7.442566718994487E-14 1.947932523136621E-13 6.283214946056781E-10 3.573024103532788E-11 1.358287450491587E-10 5.512430245160224E-12
node -1.712374400569955E-14 4.418402714767178E-14 3.573024103532788E-11 6.608973624961202E-12 2.270035394240415E-12 6.737226602703801E-13
peri 7.172175873493501E-15 -1.675358721080526E-14 1.358287450491587E-10 2.270035394240415E-12 3.667476927263305E-11 5.697961053231212E-13
i -1.107483631518082E-15 2.746968964389744E-15 5.512430245160224E-12 6.737226602703801E-13 5.697961053231212E-13 2.671378725621415E-13

[ 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 13.00   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

[ 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-Jun-23 03:50 UT
(server date/time)   		NASA Home Page
Site Manager:   Ryan S. Park
Webmaster:   Alan B. Chamberlin