IOTA/IOTA-ES occultation update for (1223) Neckar / TYC 5813-00797-1 event on 2024 Jan 16, 10:35 UT Visible from Summary ------- On 2024 Jan 16 UT, the 23.756 km diameter asteroid (1223) Neckar will occult a 11.8 mag star in the constellation Aquarius for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.46 mag to 16.24 mag (the magnitude of the asteroid) for at most 0.620 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: 100 * date and approx. time of event: 2024 Jan 16, 10:32 - 2024 Jan 16, 10:37 * geocentric midpoint of event [JD]: 2460325.94110800 * magnitude of target star: 11.80 * magnitude drop [mag]: 4.46 * estimated maximum duration [s]: 0.620 * Moon: 32 % sunlit, 22° distance * Sun: 46° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 26 * 1 sigma uncertainty interval [path widths]: +/- 0.09 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.012", 0.001", 66°) * approx speed of asteroid's shadow [km/s]: 38.1943 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 5813-00797-1 by 1223 Neckar on 2024 Jan 16 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 ' " Latitude Latitude Latitude Latitude - 28 0 0 -47 10 17 10 32 39.0 0 102 41 -47 17 27 -47 3 8 -47 18 48 -47 1 48 .... - 27 0 0 -47 18 53 10 32 39.0 1 101 41 -47 26 3 -47 11 44 -47 27 23 -47 10 24 0.36 - 26 0 0 -47 27 9 10 32 39.1 2 100 42 -47 34 18 -47 20 0 -47 35 38 -47 18 41 0.39 - 25 0 0 -47 35 4 10 32 39.2 2 100 42 -47 42 12 -47 27 56 -47 43 32 -47 26 37 0.40 - 24 0 0 -47 42 39 10 32 39.3 3 99 43 -47 49 46 -47 35 32 -47 51 6 -47 34 12 0.41 - 23 0 0 -47 49 53 10 32 39.4 4 98 44 -47 57 0 -47 42 47 -47 58 20 -47 41 27 0.41 - 22 0 0 -47 56 48 10 32 39.6 5 97 44 -48 3 54 -47 49 42 -48 5 13 -47 48 22 0.42 - 21 0 0 -48 3 22 10 32 39.8 5 97 45 -48 10 27 -47 56 16 -48 11 47 -47 54 57 0.42 - 20 0 0 -48 9 36 10 32 40.0 6 96 45 -48 16 41 -48 2 31 -48 18 0 -48 1 12 0.42 - 19 0 0 -48 15 30 10 32 40.2 7 95 46 -48 22 34 -48 8 25 -48 23 54 -48 7 7 0.42 - 18 0 0 -48 21 4 10 32 40.5 7 94 47 -48 28 8 -48 14 0 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Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: TYC 5813-00797-1 * constellation : Aquarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 22 54 50.4736 DE: -08 30 59.387 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 22 54 50.4735 DE: -08 30 59.388 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 11.8 * B mag [mag]: 12.1 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1223) Neckar asteroid class: approx. diameter [km]: 24 approx. diameter ["]: 0.010 distance from Earth [AU]: 3.35700 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#61 date of fit: 2023 Apr 24 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): 0.012", 0.001", 65.718° remarks: * orbital elements for (1223)Neckar : Mean anomaly = 306.8198660318 deg Arg. of pericenter = 14.8452939547 deg Long. of node = 40.7960651891 deg Inclination = 2.5445062915 deg Eccentricity = 0.0612582170 Semimajor axis = 2.8681751995 AU Perihelion dist = 2.6924759008 AU Mag: H = 10.58, G = 0.15 Epoch of elements : MJD 60325.44110838 TDT (2024 Jan 16.4411) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#612023Apr24,0.62,2024,1,16,10.586592,0.161753,-0.364188,19.689293,8.779304,0.003999,0.001542,-0.000001,-0.000001 69.8495,-8.3907,23.60,-20.99,False TYC 5813-00797-1,22.91402050,-8.5164961,12.12,11.80,11.63,0.0,0,,22.93461958,-8.3906906,4.46,4.19,0,0,0 1223,Neckar,16.24,23.756,3.3570,0,0,3.476,23.00,,1.6,0 0,306.7304,2024,1,16,14.8453,40.7961,2.5445,0.06126,2.86818,2.69248,10.57,5.0,0.15 1.093,0.0123,0.0009,66,0.0009,Known errors,0.88,0,-1,-1 20240116_0797-1,60137.02 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 12, 00:24 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org