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17378 (1981 EM5)
Classification: Main-belt Asteroid          SPK-ID: 2017378
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 .04549936080797313 3.8811e-08  
a 3.099005358221182 2.2489e-08 au
q 2.958002595281634 1.1606e-07 au
i 8.153083250926619 4.3695e-06 deg
node 271.8279693306143 3.9087e-05 deg
peri 183.9816204637883 7.7494e-05 deg
M 229.9810421375548 6.9063e-05 deg
tp 2460116.174471500335
(2023-Jun-20.67447150)
0.00038591 TDB
period 1992.654102136548
5.46
2.1691e-05
5.939e-08
d
yr
n .1806635680593053 1.9666e-09 deg/d
Q 3.240008121160729 2.3512e-08 au
  Orbit Determination Parameters
   # obs. used (total)      948  
   data-arc span      14790 days (40.49 yr)  
   first obs. used      1981-02-09  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54481  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-24 21:56:24  

Additional Information
 Earth MOID = 1.97495 au 
 Jupiter MOID = 1.90973 au 
 T_jup = 3.205 
[ show covariance matrix ]

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 14.01   n/a MPO636325  
diameter diameter 6.867 km 0.307 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 18.4114 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.113   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17378 (1981 EM5)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20001013/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
1951-May-10 23:23 00:02 Jupiter 1.96129453492463 1.96129385217955 1.96129521767039 3.1811212916054 3.04233372040275 2433777.474517732 2.03646660543836 127.956931140563 22.6143093823218 84.7229640446242 2670598.07879398 T 22 CATAB v2.0g-lin.ifort 2021-Aug-24 21:56:27 2021-Aug-24 21:56
1961-Apr-01 07:02 00:02 Jupiter 1.9335389323404 1.93353850925535 1.93353935542545 3.79156890481031 3.67421525610388 2437390.793388099 1.60867914175176 78.1784093547949 18.397060843638 87.0348321021803 3303559.60038975 T 22 CATAB v2.0g-lin.ifort 2021-Aug-24 21:56:27 2021-Aug-24 21:56
2021-Jun-22 01:59 < 00:01 Jupiter 1.91170071675234 1.91170016611289 1.9117012673918 3.33982924054121 3.20442098323391 2459387.582388325 0.305059838949966 90.3444006425069 22.5764980517672 86.1623505474079 2641926.63338271 T 22 CATAB v2.0g-lin.ifort 2021-Aug-24 21:56:27 2021-Aug-24 21:56
2081-Oct-01 04:21 00:02 Jupiter 1.95021166238421 1.95021112331885 1.95021220144957 3.1069278670322 2.96384109239741 2481403.681248762 2.21029482700913 136.807742178802 20.0672656100934 -89.5929954149978 2704952.77859958 T 22 CATAB v2.0g-lin.ifort 2021-Aug-24 21:56:27 2021-Aug-24 21:56
2091-Aug-23 20:46 00:02 Jupiter 1.94952893538886 1.94952826261573 1.94952960816289 3.82748178602674 3.7122319258692 2485017.365434130 2.2681818365785 105.481333135569 21.1009559768778 78.8298740041066 2737569.11191633 T 22 CATAB v2.0g-lin.ifort 2021-Aug-24 21:56:27 2021-Aug-24 21:56
2151-Nov-15 16:40 00:04 Jupiter 1.91506884795954 1.91506831631654 1.91506937960275 3.33647575014949 3.20116907135074 2507015.194646335 4.28412529233711 181.673113501644 21.2734202464609 87.8391818054073 2577588.08930063 T 22 CATAB v2.0g-lin.ifort 2021-Aug-24 21:56:27 2021-Aug-24 21:56
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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