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172777 (2004 EL57)
Classification: Main-belt Asteroid          SPK-ID: 2172777
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1387968157117092 5.7521e-08  
a 3.166110751266932 3.7493e-08 au
q 2.726664660800474 1.8759e-07 au
i 17.71304364013536 6.6255e-06 deg
node 232.61969872937 1.9976e-05 deg
peri 321.5470975478341 2.9803e-05 deg
M 304.869442571086 2.4961e-05 deg
tp 2459315.621085304775
(2021-Apr-11.12108530)
0.00014552 TDB
period 2057.726168577101
5.63
3.6552e-05
1.001e-07
d
yr
n .1749503920868814 3.1077e-09 deg/d
Q 3.605556841733389 4.2697e-08 au
  Orbit Determination Parameters
   # obs. used (total)      339  
   data-arc span      8455 days (23.15 yr)  
   first obs. used      1996-12-08  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59318  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 16:54:06  

Additional Information
 Earth MOID = 1.74435 au 
 Jupiter MOID = 1.47767 au 
 T_jup = 3.115 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456841.5 (2014-Jul-03.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1409078309508474 5.729e-08  
q 2.72010022807649 1.8774e-07 au
tp 2457257.093895832480
(2015-Aug-22.59389583)
0.00012858 TDB
node 232.747947295404 1.9975e-05 deg
peri 321.2329958095484 2.9594e-05 deg
i 17.71830897928208 6.6257e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      339  
   data-arc span      8455 days (23.15 yr)  
   first obs. used      1996-12-08  
   last obs. used      2020-02-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59318  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 16:54:06  

Additional Information
 Jupiter MOID = 1.47767 au 
 T_jup = 3.115 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.282089685567265E-15 -1.059849877609381E-14 3.409419967257271E-14 2.642565492024178E-15 4.732014226043118E-14 -6.859795755560383E-15
q -1.059849877609381E-14 3.524649957223574E-14 1.168840462824384E-12 -1.133839351900473E-15 1.871991233103952E-14 2.256217267118775E-14
tp 3.409419967257271E-14 1.168840462824384E-12 1.653368577695856E-8 1.07836212972772E-11 2.850994323872024E-9 6.399213713472905E-12
node 2.642565492024178E-15 -1.133839351900473E-15 1.07836212972772E-11 3.990086167350921E-10 -3.777333260013831E-10 -1.086564707050441E-11
peri 4.732014226043118E-14 1.871991233103952E-14 2.850994323872024E-9 -3.777333260013831E-10 8.757995033961281E-10 1.105413591007257E-11
i -6.859795755560383E-15 2.256217267118775E-14 6.399213713472905E-12 -1.086564707050441E-11 1.105413591007257E-11 4.390047562219857E-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 14.7   n/a MPO427054  
diameter diameter 6.894 km 0.073 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.049   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

172777 (2004 EL57)          Discovered 2004-Mar-15 by NEAT at Palomar
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22

[ 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
1917-Nov-20 20:24 00:05 Jupiter 1.70664825561398 1.70664366773006 1.7066528435594 5.00410789844034 4.90392502394337 2421553.349836126 4.80340888745378 583.298120250802 63.168900151168 67.8852863295391 2716369.19165481 T 17 CATAB v2.0f-lin.ifort 2020-Feb-24 16:54:24 2020-Feb-24 16:54
1928-Oct-18 14:03 00:04 Jupiter 1.49562505083577 1.49562395271381 1.49562614906222 4.6892371940622 4.56686747500711 2425538.085085229 3.78189390398719 790.154358291376 31.8898629013791 -86.5787860412121 2275278.99372901 T 17 CATAB v2.0f-lin.ifort 2020-Feb-24 16:54:24 2020-Feb-24 16:54
1939-Jul-15 07:56 00:05 Jupiter 1.89184431002386 1.89184055342779 1.89184806662444 3.30469616812853 3.16631812052566 2429459.830273156 5.29350321389048 256.365503652622 168.493901916956 20.2816834045742 608428.004636687 T 17 CATAB v2.0f-lin.ifort 2020-Feb-24 16:54:24 2020-Feb-24 16:54
2036-Feb-06 06:57 00:01 Jupiter 1.5290338592492 1.52903315047914 1.52903456802117 4.89765858687656 4.78321450986553 2464729.789888120 1.09203674981093 230.351720503965 32.0825282750593 86.7576729402788 2658070.26504169 T 17 CATAB v2.0f-lin.ifort 2020-Feb-24 16:54:24 2020-Feb-24 16:54
2047-Jan-06 01:41 00:02 Jupiter 1.59519752003621 1.59519586140102 1.59519917868744 4.48512441413625 4.36513176461299 2468716.569955009 1.91980495398418 308.558936894412 42.5725188370932 -76.1223613640339 2042036.45338498 T 17 CATAB v2.0f-lin.ifort 2020-Feb-24 16:54:24 2020-Feb-24 16:54
2143-Jun-02 20:01 00:07 Jupiter 1.7646694442992 1.76466287756675 1.76467601109766 4.9141020460033 4.81543562364016 2503927.334188925 6.55622581746291 649.092016050648 81.3601928149241 60.4079731288469 2439845.09438465 T 17 CATAB v2.0f-lin.ifort 2020-Feb-24 16:54:24 2020-Feb-24 16:54
2154-Apr-26 23:59 00:06 Jupiter 1.45868811978562 1.45868736257301 1.45868887717907 4.80158333234792 4.67908689318399 2507908.499321713 6.28913639857713 1373.22747959917 29.2242424071225 -88.9381928816572 2423324.19019238 T 17 CATAB v2.0f-lin.ifort 2020-Feb-24 16:54:24 2020-Feb-24 16:54
2165-Feb-23 17:02 00:10 Jupiter 1.80774075296169 1.80773234362741 1.80774916235907 4.00916953398842 3.890544200001 2511864.209923557 9.67923620044071 693.22294347247 94.3729585310822 -49.0991592206128 1312125.88639854 T 17 CATAB v2.0f-lin.ifort 2020-Feb-24 16:54:24 2020-Feb-24 16:54
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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