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30763 (1981 EJ47)
Classification: Main-belt Asteroid          SPK-ID: 2030763
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08670802473798483 6.1263e-08  
a 2.41836971040737 1.2717e-08 au
q 2.208677649731775 1.4352e-07 au
i 6.175020947235995 4.4842e-06 deg
node 167.79248899 4.421e-05 deg
peri 65.75487156242475 5.1363e-05 deg
M 208.7949387370172 2.3831e-05 deg
tp 2459973.460786031935
(2023-Jan-28.96078603)
9.0309e-05 TDB
period 1373.670175036304
3.76
1.0836e-05
2.967e-08
d
yr
n .2620716432097579 2.0672e-09 deg/d
Q 2.628061771082965 1.382e-08 au
  Orbit Determination Parameters
   # obs. used (total)      671  
   data-arc span      14582 days (39.92 yr)  
   first obs. used      1981-02-09  
   last obs. used      2021-01-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54515  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:39:46  

Additional Information
 Earth MOID = 1.20714 au 
 Jupiter MOID = 2.36173 au 
 T_jup = 3.502 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457727.5 (2016-Dec-05.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08620121106164161 6.1226e-08  
q 2.210474831479941 1.4329e-07 au
tp 2457227.502694677251
(2015-Jul-24.00269468)
9.678e-05 TDB
node 167.85258298101 4.4219e-05 deg
peri 66.17429115121759 5.1554e-05 deg
i 6.173832888995451 4.4855e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      671  
   data-arc span      14582 days (39.92 yr)  
   first obs. used      1981-02-09  
   last obs. used      2021-01-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54515  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:39:46  

Additional Information
 Jupiter MOID = 2.36173 au 
 T_jup = 3.502 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.748570399420485E-15 -8.749300403603187E-15 -3.287935003020052E-12 -3.249710237780427E-14 -9.042898814776912E-13 -1.217543982855335E-14
q -8.749300403603187E-15 2.0532516632114E-14 7.551099099496738E-12 7.776535633588465E-14 2.085486832220892E-12 2.875288847402004E-14
tp -3.287935003020052E-12 7.551099099496738E-12 9.366461735505844E-9 3.26859268689845E-11 2.590545003011965E-9 1.023384193362573E-11
node -3.249710237780427E-14 7.776535633588465E-14 3.26859268689845E-11 1.955350200147686E-9 -1.934346077683174E-9 9.610006341462958E-11
peri -9.042898814776912E-13 2.085486832220892E-12 2.590545003011965E-9 -1.934346077683174E-9 2.657851621637731E-9 -9.265930906389235E-11
i -1.217543982855335E-14 2.875288847402004E-14 1.023384193362573E-11 9.610006341462958E-11 -9.265930906389235E-11 2.011983598837733E-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 16.23   n/a MPCxxxxx  

30763 (1981 EJ47)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1980-Mar-18 21:28 00:01 David 0.041528059789137 0.0415265679663468 0.0415295521953059 5.05190758680381 5.05190751479494 2444317.394362878 1.07424600942051 287.833955406723 35.0139450023193 -76.7236402375524 172660.231467753 T 22 CATAB v2.0f-lin.ifort 2021-Apr-13 06:39:48 2021-Apr-13 06:39
2025-May-04 05:59 00:01 David 0.0350984172233842 0.035096000412771 0.0351008341972341 5.27393461310118 5.27393453148791 2460799.749546016 1.01816351594381 173.192737611226 34.2647976955367 -47.13772167619 114137.559807454 T 22 CATAB v2.0f-lin.ifort 2021-Apr-13 06:39:48 2021-Apr-13 06:39
2031-Sep-24 01:01 < 00:01 Amphi 0.0246018965878671 0.0246003729064942 0.0246034207760359 4.92866306164061 4.92866301423003 2463133.542678860 0.572834140529417 250.140436828409 51.2151231925668 -76.7516726729967 70004.6928710117 T 22 CATAB v2.0f-lin.ifort 2021-Apr-13 06:39:48 2021-Apr-13 06:39
2061-May-22 09:41 < 00:01 Iris 0.0421406524203637 0.0421291274172487 0.0421521775348566 6.44544382151365 6.44544380034862 2473966.903654960 0.990045532125242 584.752321449962 63.6216673558661 -10.7687665799057 21323.6710777662 T 22 CATAB v2.0f-lin.ifort 2021-Apr-13 06:39:48 2021-Apr-13 06:39

Alternate Designations
 1981 EJ47 = 2000 HD67 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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