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 ]  
85144 (1981 EU30)
Classification: Main-belt Asteroid          SPK-ID: 2085144
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1329853485896364 5.3617e-08  
a 2.346151055477356 9.4915e-09 au
q 2.034147339520757 1.2638e-07 au
i 6.519821643741632 5.639e-06 deg
node 340.7605331569881 3.5135e-05 deg
peri 3.725974246430503 3.8297e-05 deg
M 220.885312919151 1.5606e-05 deg
tp 2459707.727586007646
(2022-May-08.22758601)
5.7627e-05 TDB
period 1312.599947528403
3.59
7.9653e-06
2.181e-08
d
yr
n .2742648288824573 1.6643e-09 deg/d
Q 2.658154771433956 1.0754e-08 au
  Orbit Determination Parameters
   # obs. used (total)      945  
   data-arc span      14283 days (39.10 yr)  
   first obs. used      1981-02-12  
   last obs. used      2020-03-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53821  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:01:57  

Additional Information
 Earth MOID = 1.02468 au 
 Jupiter MOID = 2.72746 au 
 T_jup = 3.540 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457277.5 (2015-Sep-12.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1334522769959595 5.3921e-08  
q 2.03304414650346 1.2725e-07 au
tp 2457080.015547478232
(2015-Feb-26.51554748)
5.4992e-05 TDB
node 340.8273294201028 3.5086e-05 deg
peri 3.195617473487286 3.8198e-05 deg
i 6.526043684121396 5.6427e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      945  
   data-arc span      14283 days (39.10 yr)  
   first obs. used      1981-02-12  
   last obs. used      2020-03-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53821  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:01:57  

Additional Information
 Jupiter MOID = 2.72746 au 
 T_jup = 3.540 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.907459605619701E-15 -6.847454252946019E-15 -6.302527776377823E-13 1.114979356450301E-16 -2.540939037588739E-13 1.334429178987664E-15
q -6.847454252946019E-15 1.619364403639411E-14 1.478397450623048E-12 -6.51727140915889E-16 5.994599289005122E-13 -2.898463239840245E-15
tp -6.302527776377823E-13 1.478397450623048E-12 3.024163713460107E-9 -3.873454437497932E-12 8.38601827330678E-10 -4.079388964858337E-12
node 1.114979356450301E-16 -6.51727140915889E-16 -3.873454437497932E-12 1.231007305744298E-9 -1.223426302905535E-9 -5.25784940469421E-11
peri -2.540939037588739E-13 5.994599289005122E-13 8.38601827330678E-10 -1.223426302905535E-9 1.459052345175791E-9 5.108273728675794E-11
i 1.334429178987664E-15 -2.898463239840245E-15 -4.079388964858337E-12 -5.25784940469421E-11 5.108273728675794E-11 3.18396094727989E-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 15.37   n/a E2021B10  

85144 (1981 EU30)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-12 12:07 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin