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 ]  
17376 (1981 EQ4)
Classification: Main-belt Asteroid          SPK-ID: 2017376
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1373001785875624 3.711e-08  
a 3.117724826118846 2.0116e-08 au
q 2.689660650705851 1.0957e-07 au
i 8.496761576478667 4.9983e-06 deg
node 228.3165326516475 2.6232e-05 deg
peri 273.7338570580567 3.1846e-05 deg
M 118.4085781130377 1.7632e-05 deg
tp 2458539.143290345114
(2019-Feb-24.64329035)
9.8496e-05 TDB
period 2010.736209064769
5.51
1.946e-05
5.328e-08
d
yr
n .1790389004669303 1.7328e-09 deg/d
Q 3.54578900153184 2.2878e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1093  
   data-arc span      16198 days (44.35 yr)  
   first obs. used      1976-05-03  
   last obs. used      2020-09-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51374  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:02:12  

Additional Information
 Earth MOID = 1.71915 au 
 Jupiter MOID = 1.60994 au 
 T_jup = 3.186 
[ 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 14.28   n/a E2021B10  
diameter diameter 8.981 km 0.160 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 136.172 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 0.055   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

17376 (1981 EQ4)          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
1940-Nov-16 16:42 00:02 Jupiter 1.87663895490908 1.87663769364113 1.87664021618087 3.92499303904537 3.80826321804079 2429950.195936391 2.21415172081367 161.064111813829 21.5369870983219 71.8175605611587 2849836.7367834 T 22 CATAB v2.0f-lin.ifort 2021-Apr-13 02:02:16 2021-Apr-13 02:02
1950-Nov-23 10:14 00:02 Jupiter 1.6100247989911 1.61002426042662 1.61002533755504 1.45092917327096 1.02616265552295 2433608.926176862 2.22153482252102 394.918984709884 120.668148487406 1.59653768421191 820045.098103986 T 22 CATAB v2.0f-lin.ifort 2021-Apr-13 02:02:16 2021-Apr-13 02:02
1960-Oct-21 16:21 00:02 Jupiter 1.89907079579 1.89907003044682 1.89907156113318 2.96719578552487 2.81286543055195 2437229.181292127 1.65351103880913 95.1027619499439 21.3906954275845 84.1239477497787 1568085.495417 T 22 CATAB v2.0f-lin.ifort 2021-Apr-13 02:02:16 2021-Apr-13 02:02
2022-Jul-30 14:26 < 00:01 Jupiter 1.60827469722442 1.60827418932614 1.60827520512243 2.09141928935044 1.82227989070051 2459791.101609260 0.410603994398013 68.0109819455991 40.4701150840447 85.3186742271623 1601151.18590493 T 22 CATAB v2.0f-lin.ifort 2021-Apr-13 02:02:16 2021-Apr-13 02:02
2032-Jun-15 06:20 < 00:01 Jupiter 1.8072532534598 1.80725254143662 1.80725396548267 2.28261692410817 2.06711902573948 2463398.764208217 0.706647214066649 90.7413776763492 21.743589715721 87.574112972112 1559385.4855305 T 22 CATAB v2.0f-lin.ifort 2021-Apr-13 02:02:16 2021-Apr-13 02:02
2094-Mar-28 23:16 00:03 Jupiter 1.64335691899421 1.64335605508135 1.64335778291425 2.73637018640205 2.54103867584325 2485965.469141763 2.60831385087674 227.554881064332 19.5478242023883 89.0454504775552 1793526.54927545 T 22 CATAB v2.0f-lin.ifort 2021-Apr-13 02:02:16 2021-Apr-13 02:02
2104-Feb-22 10:49 00:03 Jupiter 1.72757855800269 1.72757716329849 1.72757995271562 1.61142991024822 1.2712659324687 2489581.950383312 3.23923764732538 401.386037339539 62.3861609368829 47.8138552415115 2226232.72501958 T 22 CATAB v2.0f-lin.ifort 2021-Apr-13 02:02:16 2021-Apr-13 02:02
2165-Nov-20 13:56 00:05 Jupiter 1.72026971254244 1.72026745068036 1.72027197443395 3.29235453612088 3.13924241083466 2512134.080282384 4.69998807659568 390.605102883081 19.8249504528841 78.0535178403232 2247563.24556821 T 22 CATAB v2.0f-lin.ifort 2021-Apr-13 02:02:16 2021-Apr-13 02:02
2175-Nov-12 04:39 00:06 Jupiter 1.64988080066244 1.64987902572707 1.64988257559987 1.33496514579654 0.869116684801483 2515777.693692807 5.81441679536292 320.323645185622 112.921256152465 30.6451959481484 2075806.61446224 T 22 CATAB v2.0f-lin.ifort 2021-Apr-13 02:02:16 2021-Apr-13 02:02

Alternate Designations
 1981 EQ4 = 1976 JQ5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-May-14 12:36 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin