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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1509581093652076 1.0382e-08  
a 3.134020004698133 1.3092e-08 au
q 2.660914270076164 3.3653e-08 au
i 1.43036931147692 2.4532e-07 deg
node 161.2630040129452 1.3712e-05 deg
peri 123.9885194119799 1.7708e-05 deg
M 352.9545253093045 6.5589e-06 deg
tp 2459436.160559048539
(2021-Aug-09.66055905)
3.6952e-05 TDB
period 2026.520835612406
5.55
1.2699e-05
3.477e-08
d
yr
n .1776443615449972 1.1132e-09 deg/d
Q 3.607125739320102 1.5069e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3110  
   data-arc span      21802 days (59.69 yr)  
   first obs. used      1961-10-18  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46914  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 22:04:49  

Additional Information
 Earth MOID = 1.64454 au 
 Jupiter MOID = 1.54958 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 12.12   n/a E2021B10  
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 03:14 00:02 Jupiter 1.90404165262157 1.90404042565574 1.9040428795875 2.41882162211019 2.22732754096085 2418048.634982618 2.11731410724778 71.9320254840391 3.26250842824606 -68.0567443295432 5940629.97306308 T 43 CATAB v2.0g-lin.ifort 2021-Jul-07 22:06:42 2021-Jul-07 22:06
1918-Aug-01 15:02 00:02 Jupiter 1.55188523012906 1.55188481503013 1.55188564522772 1.42015126552114 0.961886187979639 2421807.126504994 1.93923153891597 52.5862551196482 8.83537348554002 -16.2710370077414 6336699.49314707 T 43 CATAB v2.0g-lin.ifort 2021-Jul-07 22:06:42 2021-Jul-07 22:06
1928-Nov-04 20:05 00:02 Jupiter 1.68276676055564 1.68276601652266 1.68276750458928 2.24918698670216 2.01299276896007 2425555.337018548 1.74606077344861 80.4479449453221 1.00296558177817 88.563681278125 5179678.41426395 T 43 CATAB v2.0g-lin.ifort 2021-Jul-07 22:06:42 2021-Jul-07 22:06
1991-Sep-15 10:00 < 00:01 Jupiter 1.98533075785084 1.98533034131233 1.98533117438925 2.70928456840041 2.54694755906133 2448514.916784413 0.531289899509554 22.0774084765431 4.96311058447004 -58.6628188584796 6194683.68218405 T 43 CATAB v2.0g-lin.ifort 2021-Jul-07 22:06:42 2021-Jul-07 22:06
2002-Jan-01 19:52 < 00:01 Jupiter 1.59172539966195 1.59172521232164 1.59172558700217 1.47280586460824 1.05113029982741 2452276.327987143 0.339757085101235 34.9075908003285 7.66180490838169 -14.4738255514392 7949422.45156858 T 43 CATAB v2.0g-lin.ifort 2021-Jul-07 22:06:42 2021-Jul-07 22:06
2012-Apr-12 06:42 < 00:01 Jupiter 1.62325119737378 1.62325094970192 1.62325144504555 1.94613971138668 1.65645628089292 2456029.779452898 0.168441808746253 11.039329515951 5.04163702668204 43.631142211397 5152844.46190325 T 43 CATAB v2.0g-lin.ifort 2021-Jul-07 22:06:42 2021-Jul-07 22:06
2085-Jun-07 12:27 00:01 Jupiter 1.65575590834609 1.65575541778103 1.65575639891078 1.60828823851252 1.25038642186025 2482749.018436246 1.33584132256754 39.6684706305619 12.675106110801 26.4782604549445 4515073.85243104 T 43 CATAB v2.0g-lin.ifort 2021-Jul-07 22:06:42 2021-Jul-07 22:06
2095-Sep-18 08:15 00:02 Jupiter 1.58632188506704 1.58632139781181 1.58632237232191 1.72236261412022 1.37790619591551 2486503.843921477 1.59486506974779 68.934140521554 11.6416395104557 36.6103346081501 4584612.62508739 T 43 CATAB v2.0g-lin.ifort 2021-Jul-07 22:06:42 2021-Jul-07 22:06
2105-Dec-27 10:55 00:02 Jupiter 1.95330133749906 1.95330033421968 1.95330234077955 3.63265767799259 3.51125747498355 2490255.954566797 1.72134773342559 91.6523228332594 8.10615999226505 -65.0062575597558 6182395.02723365 T 43 CATAB v2.0g-lin.ifort 2021-Jul-07 22:06:42 2021-Jul-07 22:06
2168-Nov-10 00:38 00:03 Jupiter 1.72009731708103 1.7200960279243 1.72009860623648 1.7704394608945 1.46615200807478 2513219.526048038 2.94006391341738 81.2759070391182 9.36632193198326 59.6961284673551 5469943.05264845 T 43 CATAB v2.0g-lin.ifort 2021-Jul-07 22:06:42 2021-Jul-07 22:06
2179-Feb-23 14:06 00:03 Jupiter 1.56119728867429 1.56119680794229 1.56119776940531 1.54798029878475 1.14505437009989 2516977.087623274 3.21249944570736 152.98924252385 12.8204340444031 10.1311131567665 2643215.92503941 T 43 CATAB v2.0g-lin.ifort 2021-Jul-07 22:06:42 2021-Jul-07 22:06
2189-Jun-01 19:26 00:03 Jupiter 1.86387733520452 1.86387555092801 1.86387911948537 3.16840344629282 3.02157213227892 2520728.309858571 3.37247605593623 172.443031341467 7.16249947580268 -70.0211022274087 5777988.81646187 T 43 CATAB v2.0g-lin.ifort 2021-Jul-07 22:06:42 2021-Jul-07 22:06

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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