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2919 Dali (1981 EX18)
Classification: Main-belt Asteroid          SPK-ID: 2002919
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1506454589618662 2.8983e-08  
a 3.133572482256941 1.5367e-08 au
q 2.66151401747707 9.5956e-08 au
i 1.430263914845119 3.6537e-06 deg
node 161.2660378727911 0.0001309 deg
peri 123.9166146315815 0.00013154 deg
M 282.6322707799831 1.4275e-05 deg
tp 2459435.927038322630
(2021-Aug-09.42703832)		 8.1467e-05 TDB
period 2026.086785491316
5.55		 1.4904e-05
4.08e-08		 d
yr
n .1776824184323881 1.307e-09 deg/d
Q 3.605630947036812 1.7682e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2994  
   data-arc span      21478 days (58.80 yr)  
   first obs. used      1961-10-18  
   last obs. used      2020-08-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46925  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:04:49  

Additional Information
 Earth MOID = 1.64543 au 
 Jupiter MOID = 1.55254 au 
 T_jup = 3.194 
[ 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 12.0   n/a MPO435725  
diameter diameter 18.521 km 0.108 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 7.43 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Warner, B.D. (2017) Minor Planet Bull. 44, 12-19.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.125   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

2919 Dali (1981 EX18)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ 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
1908-Apr-17 03:12 00:02 Jupiter 1.90404041151756 1.90403893493279 1.90404188810244 2.41881759848541 2.22732304011474 2418048.633525852 2.48523746163002 93.5042474450587 15.3073555344585 -71.314067666195 2019569.79357244 T 40 CATAB v2.0f-lin.ifort 2020-Nov-13 04:04:56 2020-Nov-13 04:04
1918-Aug-01 15:00 00:02 Jupiter 1.55188517450676 1.55188472566776 1.55188562334533 1.42015209805774 0.961887393683443 2421807.125292340 2.25699242505231 116.665227456664 66.7338607004041 -17.3204250009174 2873423.82870429 T 40 CATAB v2.0f-lin.ifort 2020-Nov-13 04:04:56 2020-Nov-13 04:04
1928-Nov-04 20:04 00:02 Jupiter 1.68276761727199 1.68276662570004 1.68276860884452 2.24919131165897 2.01299772730615 2425555.336022636 2.01641261090924 97.3743681920895 5.51099417137257 87.961836087263 2453216.35469045 T 40 CATAB v2.0f-lin.ifort 2020-Nov-13 04:04:56 2020-Nov-13 04:04
1991-Sep-15 10:00 < 00:01 Jupiter 1.98533048189373 1.98532994191478 1.98533102187269 2.70928393843579 2.54694686473508 2448514.916566835 0.603516730539191 41.6611613185059 14.4939507391467 -79.808380934559 2992140.2379134 T 40 CATAB v2.0f-lin.ifort 2020-Nov-13 04:04:56 2020-Nov-13 04:04
2002-Jan-01 19:52 < 00:01 Jupiter 1.59172560452041 1.59172530676831 1.59172590227233 1.47280690207959 1.05113181585379 2452276.327894931 0.362539868117822 89.0509966656034 59.6780276917658 -27.7607346365934 3061005.30044149 T 40 CATAB v2.0f-lin.ifort 2020-Nov-13 04:04:56 2020-Nov-13 04:04
2012-Apr-12 06:42 < 00:01 Jupiter 1.62325146054092 1.62325111443986 1.62325180664179 1.9461409283585 1.65645776002115 2456029.779491622 0.183234088667399 37.9738203045062 16.6747749030204 81.7165698769601 2763891.9528077 T 40 CATAB v2.0f-lin.ifort 2020-Nov-13 04:04:56 2020-Nov-13 04:04
2085-Jun-07 12:27 00:02 Jupiter 1.65575638148157 1.65575567605479 1.65575708690732 1.60829002534239 1.25038883478636 2482749.018897967 1.6219715501508 68.8642469459097 56.2849156940275 14.3671994768462 1635830.2499177 T 40 CATAB v2.0f-lin.ifort 2020-Nov-13 04:04:56 2020-Nov-13 04:04
2095-Sep-18 08:16 00:02 Jupiter 1.58632197444282 1.58632147622193 1.58632247266334 1.72236274731898 1.37790638210423 2486503.844458229 1.93853186610273 83.1659922611324 35.8898673266817 51.4428076849246 2170050.92189141 T 40 CATAB v2.0f-lin.ifort 2020-Nov-13 04:04:56 2020-Nov-13 04:04
2105-Dec-27 10:55 00:02 Jupiter 1.95330085077032 1.95329967108663 1.95330203045579 3.63265530044854 3.51125498378084 2490255.955189211 2.11655983217003 116.1815114553 14.846490196576 -67.4367835221067 3463018.55911623 T 40 CATAB v2.0f-lin.ifort 2020-Nov-13 04:04:56 2020-Nov-13 04:04
2168-Nov-10 00:39 00:04 Jupiter 1.72009816058132 1.72009655583104 1.72009976532916 1.77044246951838 1.46615580395639 2513219.527096768 3.52227108233037 104.06905511314 33.4057601615756 60.1243887740075 1300843.00073588 T 40 CATAB v2.0f-lin.ifort 2020-Nov-13 04:04:56 2020-Nov-13 04:04
2179-Feb-23 14:08 00:04 Jupiter 1.56119736914292 1.56119687837992 1.56119785990485 1.54797990402177 1.14505385823063 2516977.088834979 3.85591906578983 163.036939749674 56.0361150728592 14.8876979576609 1442731.90425743 T 40 CATAB v2.0f-lin.ifort 2020-Nov-13 04:04:56 2020-Nov-13 04:04
2189-Jun-01 19:28 00:04 Jupiter 1.86387639492207 1.86387431869163 1.86387847115899 3.16839858938438 3.02156696264806 2520728.311185648 4.06990025038794 210.559729717263 13.1346394175091 -71.0780131485027 3105768.63400455 T 40 CATAB v2.0f-lin.ifort 2020-Nov-13 04:04:56 2020-Nov-13 04:04

Alternate Designations
 1981 EX18 = 1961 UN = 1971 MD = 1977 RW1 = 1978 XP 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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