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

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
19115 (1981 EM39)
Classification: Main-belt Asteroid          SPK-ID: 2019115
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09092091237198574 3.5195e-08  
a 2.289966629445719 8e-09 au
q 2.081760774195113 7.8041e-08 au
i 5.279938952438159 4.7082e-06 deg
node 358.5185321806028 3.7321e-05 deg
peri 227.4850810375863 4.5435e-05 deg
M 179.4628117538571 2.6139e-05 deg
tp 2458765.522134837430
(2019-Oct-09.02213484)
9.1578e-05 TDB
period 1265.733157965209
3.47
6.6328e-06
1.816e-08
d
yr
n .2844201384269142 1.4904e-09 deg/d
Q 2.498172484696324 8.7274e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1198  
   data-arc span      14555 days (39.85 yr)  
   first obs. used      1981-02-02  
   last obs. used      2020-12-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50935  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:06:51  

Additional Information
 Earth MOID = 1.07759 au 
 Jupiter MOID = 2.48526 au 
 T_jup = 3.588 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457394.5 (2016-Jan-07.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09032062867850298 3.5252e-08  
q 2.083946827427136 7.8125e-08 au
tp 2457498.925065116177
(2016-Apr-20.42506512)
9.1829e-05 TDB
node 358.5788031602282 3.7331e-05 deg
peri 227.4277188989164 4.5504e-05 deg
i 5.278926244523907 4.7064e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1198  
   data-arc span      14555 days (39.85 yr)  
   first obs. used      1981-02-02  
   last obs. used      2020-12-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50935  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:06:51  

Additional Information
 Jupiter MOID = 2.48526 au 
 T_jup = 3.588 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.242676649935169E-15 -2.743795348019606E-15 -7.305277149555292E-13 -2.115819487021466E-15 -2.397231692039464E-13 7.801917937957272E-16
q -2.743795348019606E-15 6.103557636220749E-15 1.679767315738442E-12 3.93925751388792E-15 5.468390481146608E-13 -1.759814689016216E-15
tp -7.305277149555292E-13 1.679767315738442E-12 8.432571831992427E-9 -1.802825695378399E-12 2.39623924780897E-9 -3.201358566349083E-12
node -2.115819487021466E-15 3.93925751388792E-15 -1.802825695378399E-12 1.393615735207582E-9 -1.387768409935544E-9 -4.208515651539483E-11
peri -2.397231692039464E-13 5.468390481146608E-13 2.39623924780897E-9 -1.387768409935544E-9 2.070602708646551E-9 4.100935554258614E-11
i 7.801917937957272E-16 -1.759814689016216E-15 -3.201358566349083E-12 -4.208515651539483E-11 4.100935554258614E-11 2.215003157575775E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.51   n/a MPCxxxxx  
diameter diameter 2.164 km 0.462 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.314   0.117 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19115 (1981 EM39)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-18 21:00 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin