IOTA/IOTA-ES occultation update for (624) Hektor / TYC 2923-00251-1 event on 2022 Nov 08, 05:22 UT Visible from Europe Summary ------- On 2022 Nov 08 UT, the 184 km diameter asteroid (624) Hektor will occult a 10.9 mag star in the constellation Auriga for observers along a path across Europe. In the case of an occultation, the combined light of the asteroid and the star will drop by 4.00 mag to 14.89 mag (the magnitude of the asteroid) for at most 16.230 seconds. This update is based on, astrometry for the asteroid kindly provided by the IAU Minor Planet Center. This work has made use of data from the European Space Agency (ESA) mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, http://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. The event at a glimpse ---------------------- * Rank: 98 * date and approx. time of event: 2022 Nov 08, 05:14 - 2022 Nov 08, 05:31 * geocentric midpoint of event [JD]: 2459891.72412671 * magnitude of target star: 10.92 * magnitude drop [mag]: 4.00 * estimated maximum duration [s]: 16.230 * Moon: 100 % sunlit, 49° distance * Sun: 134° distance * rough path description: Europe The occultation path -------------------- * approximate projected width [km]: 206 * 1 sigma uncertainty interval [path widths]: +/- 0.34 * 1 sigma uncertainty interval [seconds]: +/- 10.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.040, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.040", 0.003", 93°) * approx speed of asteroid's shadow [km/s]: 11.3395 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 2923-00251-1 by 624 Hektor #1 on 2022 Nov 8 Centre Star Star Sun Path Limits Error Limits Alt E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 Crn o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Longitude Longitude Longitude Longitude 48 30 49 - 3 0 0 5 14 22.6 0 315 40 ... .. .. 47 13 12 ... .. .. 46 45 29 .... 47 31 4 - 2 0 0 5 14 22.8 1 315 39 48 48 56 46 14 26 49 17 22 45 47 3 -0.37 46 32 46 - 1 0 0 5 14 23.4 3 315 38 47 49 40 45 17 3 48 17 44 44 49 58 -0.42 45 35 51 0 0 0 5 14 24.3 4 315 36 46 51 51 44 20 56 47 19 35 43 54 9 -0.44 44 40 12 1 0 0 5 14 25.6 6 315 35 45 55 24 43 26 2 46 22 50 42 59 29 -0.45 Latitude Latitude Latitude Latitude 43 0 0 2 51 20 5 14 28.8 8 315 33 4 15 14 1 28 53 4 45 55 0 59 26 -0.42 42 0 0 4 0 2 5 14 31.4 10 314 32 5 25 3 2 36 31 5 56 8 2 6 42 -0.46 41 0 0 5 10 12 5 14 34.4 11 314 30 6 36 21 3 45 36 7 7 52 3 15 25 -0.46 40 0 0 6 21 50 5 14 37.9 13 314 29 7 49 8 4 56 9 8 21 5 4 25 35 -0.46 39 0 0 7 34 53 5 14 41.8 14 314 28 9 3 22 6 8 5 9 35 46 5 37 8 -0.46 38 0 0 8 49 20 5 14 46.3 16 314 26 10 19 1 7 21 25 10 51 51 6 50 4 -0.46 37 0 0 10 5 7 5 14 51.3 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47 25 -0.51 -168 0 0 54 17 17 5 30 30.5 19 38 -18 56 16 15 52 22 37 57 0 25 51 42 9 -0.51 -169 0 0 53 10 43 5 30 34.9 18 37 -18 55 10 21 51 15 27 55 54 46 50 34 47 -0.51 -170 0 0 52 1 56 5 30 39.1 16 36 -17 54 2 7 50 6 9 54 46 44 49 25 18 -0.52 -171 0 0 50 50 56 5 30 43.1 15 35 -16 52 51 33 48 54 45 53 36 20 48 13 46 -0.52 -172 0 0 49 37 47 5 30 46.9 14 35 -16 51 38 43 47 41 18 52 23 36 47 0 13 -0.52 -173 0 0 48 22 32 5 30 50.5 12 34 -15 50 23 39 46 25 51 51 8 37 45 44 42 -0.53 -174 0 0 47 5 14 5 30 53.7 11 33 -14 49 6 26 45 8 29 49 51 25 44 27 18 -0.53 -175 0 0 45 46 0 5 30 56.7 9 32 -13 47 47 8 43 49 16 48 32 5 43 8 5 -0.54 -176 0 0 44 24 54 5 30 59.3 8 32 -12 46 25 51 42 28 18 47 10 43 41 47 10 -0.55 -177 0 0 43 2 3 5 31 1.4 6 31 -11 45 2 42 41 5 42 45 47 27 40 24 39 -0.57 -178 0 0 41 37 34 5 31 3.2 5 30 -10 43 37 48 39 41 35 44 22 23 39 0 39 -0.60 -179 0 0 40 11 37 5 31 4.5 3 30 -9 42 11 18 38 16 5 42 55 41 37 35 17 -0.67 -180 0 0 38 44 18 5 31 5.2 2 29 -8 40 43 21 .. .. .. 41 27 28 .. .. .. -0.87 Uncertainty in time = +/- 6 secs Prediction of 2022 Oct 17.0 Data for the target star ------------------------ * name: TYC 2923-00251-1 * constellation : Auriga * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 05 48 19.6323 DE: +44 29 01.527 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 05 48 19.6326 DE: +44 29 01.528 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (624) Hektor asteroid class: asteroid system: multiple bodies approx. diameter [km]: 184 approx. diameter ["]: 0.056 distance from Earth [AU]: 4.52050 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#119 date of fit: 2022 Sep 21 source of used astrometry: MPC, JPL number of used observations: 0 number of rejected observations: 0 time covered by the observations: 1800 Jan 01 - 1800 Jan 01 1 sigma uncertainty ellipse (major, minor, PA): 0.021", 0.002", 93.149° remarks: * orbital elements for (624)Hektor : Mean anomaly = 279.1645192522 deg Arg. of pericenter = 180.3848733983 deg Long. of node = 342.7857830904 deg Inclination = 18.1549672646 deg Eccentricity = 0.0228455712 Semimajor axis = 5.2696663270 AU Perihelion dist = 5.1492777899 AU Mag: H = 7.46, G = 0.15 Epoch of elements : MJD 59891.22395833 TDT (2022 Nov 08.2240) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#1192022Sep21 Binary solution 1 : Kepler,16.23,2022,11,8,5.379041,0.233138,0.386898,-5.481141,3.304717,-0.004048,-0.001687,0.000001,0.000000 -40.5689,44.4903,95.25,-16.56,False TYC 2923-00251-1,5.80545349,44.4837577,0.00,10.92,0.00,0.0,0,,5.83337366,44.4902858,4.00,0.00,0,0,0 624,Hektor #1,14.89,184.0,4.5205,0,1,-0.996,6.43,,12.0,0 Skamandrios,12,957.500,2.965079,0.3100,,,,, 0,279.1463,2022,11,8,180.3849,342.7858,18.1550,0.02285,5.26967,5.14928,7.46,5.0,0.15 1.181,0.0213,0.0018,93,0.0101,Known errors + binary orbit,-1.00,-1,-1,-1 20221108_0251-1_Ma1,59868.97 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Oct 16, 23:11 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org