IOTA/IOTA-ES occultation update for (2505) Hebei / TYC 6193-00535-1 event on 2024 Jan 22, 00:57 UT Visible from Summary ------- On 2024 Jan 22 UT, the 23.4812646621563 km diameter asteroid (2505) Hebei will occult a 10.1 mag star in the constellation Libra for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.22 mag to 17.30 mag (the magnitude of the asteroid) for at most 0.730 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 22, 00:54 - 2024 Jan 22, 01:00 * geocentric midpoint of event [JD]: 2460331.54013013 * magnitude of target star: 10.08 * magnitude drop [mag]: 7.22 * estimated maximum duration [s]: 0.730 * Moon: 86 % sunlit, 159° distance * Sun: 63° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 25 * 1 sigma uncertainty interval [path widths]: +/- 0.09 * 1 sigma uncertainty interval [seconds]: +/- 1.3 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.019, +/- 0.005) * 1 sigma uncertainty ellipse (major, minor, PA): (0.020", 0.001", 105°) * approx speed of asteroid's shadow [km/s]: 32.4920 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6193-00535-1 by 2505 Hebei on 2024 Jan 22 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 11 0 0 - 2 51 31 0 54 38.9 0 109 -59 - 2 58 38 - 2 44 24 - 2 59 55 - 2 43 7 .... 12 0 0 - 3 12 45 0 54 39.0 1 109 -58 - 3 19 53 - 3 5 38 - 3 21 10 - 3 4 20 0.27 13 0 0 - 3 34 17 0 54 39.1 2 109 -57 - 3 41 25 - 3 27 9 - 3 42 43 - 3 25 52 0.29 14 0 0 - 3 56 7 0 54 39.3 4 109 -56 - 4 3 16 - 3 48 59 - 4 4 34 - 3 47 41 0.29 15 0 0 - 4 18 15 0 54 39.6 5 109 -55 - 4 25 24 - 4 11 5 - 4 26 42 - 4 9 48 0.29 16 0 0 - 4 40 39 0 54 39.9 6 109 -54 - 4 47 49 - 4 33 29 - 4 49 7 - 4 32 11 0.29 17 0 0 - 5 3 20 0 54 40.3 7 109 -53 - 5 10 31 - 4 56 9 - 5 11 49 - 4 54 51 0.30 18 0 0 - 5 26 17 0 54 40.8 8 109 -52 - 5 33 28 - 5 19 5 - 5 34 46 - 5 17 47 0.30 19 0 0 - 5 49 29 0 54 41.3 9 109 -51 - 5 56 41 - 5 42 17 - 5 57 59 - 5 40 59 0.30 20 0 0 - 6 12 56 0 54 42.0 10 108 -50 - 6 20 9 - 6 5 43 - 6 21 27 - 6 4 25 0.30 21 0 0 - 6 36 38 0 54 42.7 11 108 -49 - 6 43 51 - 6 29 24 - 6 45 10 - 6 28 6 0.30 22 0 0 - 7 0 33 0 54 43.4 12 108 -48 - 7 7 48 - 6 53 19 - 7 9 6 - 6 52 1 0.30 23 0 0 - 7 24 42 0 54 44.3 13 108 -47 - 7 31 57 - 7 17 28 - 7 33 16 - 7 16 9 0.30 24 0 0 - 7 49 4 0 54 45.2 14 108 -46 - 7 56 20 - 7 41 49 - 7 57 38 - 7 40 31 0.30 25 0 0 - 8 13 38 0 54 46.1 15 108 -45 - 8 20 54 - 8 6 23 - 8 22 13 - 8 5 4 0.30 26 0 0 - 8 38 24 0 54 47.2 16 108 -44 - 8 45 41 - 8 31 8 - 8 47 0 - 8 29 49 0.30 27 0 0 - 9 3 21 0 54 48.3 17 107 -43 - 9 10 38 - 8 56 4 - 9 11 57 - 8 54 45 0.30 28 0 0 - 9 28 29 0 54 49.5 18 107 -42 - 9 35 46 - 9 21 11 - 9 37 5 - 9 19 52 0.30 29 0 0 - 9 53 46 0 54 50.7 20 107 -41 -10 1 4 - 9 46 28 -10 2 23 - 9 45 9 0.30 30 0 0 -10 19 12 0 54 52.1 21 107 -40 -10 26 31 -10 11 54 -10 27 50 -10 10 35 0.30 31 0 0 -10 44 47 0 54 53.5 22 107 -39 -10 52 6 -10 37 29 -10 53 26 -10 36 9 0.30 32 0 0 -11 10 30 0 54 54.9 23 106 -38 -11 17 50 -11 3 11 -11 19 9 -11 1 52 0.30 33 0 0 -11 36 21 0 54 56.4 24 106 -37 -11 43 40 -11 29 1 -11 45 0 -11 27 42 0.30 34 0 0 -12 2 17 0 54 58.0 25 106 -36 -12 9 38 -11 54 57 -12 10 57 -11 53 38 0.30 35 0 0 -12 28 20 0 54 59.7 26 105 -34 -12 35 41 -12 21 0 -12 37 0 -12 19 40 0.30 36 0 0 -12 54 28 0 55 1.4 27 105 -33 -13 1 49 -12 47 7 -13 3 9 -12 45 48 0.30 37 0 0 -13 20 41 0 55 3.2 28 105 -32 -13 28 2 -13 13 20 -13 29 22 -13 12 0 0.30 38 0 0 -13 46 57 0 55 5.0 29 105 -31 -13 54 19 -13 39 36 -13 55 38 -13 38 16 0.30 39 0 0 -14 13 17 0 55 6.9 30 104 -30 -14 20 38 -14 5 55 -14 21 58 -14 4 35 0.30 40 0 0 -14 39 39 0 55 8.8 31 104 -29 -14 47 1 -14 32 17 -14 48 21 -14 30 57 0.30 41 0 0 -15 6 2 0 55 10.8 32 103 -28 -15 13 25 -14 58 40 -15 14 45 -14 57 21 0.30 42 0 0 -15 32 27 0 55 12.9 33 103 -27 -15 39 50 -15 25 5 -15 41 10 -15 23 45 0.30 43 0 0 -15 58 52 0 55 15.0 34 103 -26 -16 6 15 -15 51 30 -16 7 35 -15 50 10 0.30 44 0 0 -16 25 17 0 55 17.2 35 102 -25 -16 32 40 -16 17 55 -16 34 0 -16 16 35 0.30 45 0 0 -16 51 41 0 55 19.4 36 102 -24 -16 59 3 -16 44 18 -17 0 23 -16 42 58 0.30 46 0 0 -17 18 2 0 55 21.7 37 101 -23 -17 25 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-33 57 16 -33 43 14 -33 58 33 -33 41 58 0.31 -176 0 0 -33 34 16 1 0 48.0 15 257 70 -33 41 18 -33 27 14 -33 42 35 -33 25 58 0.31 -175 0 0 -33 17 58 1 0 48.8 14 256 69 -33 25 0 -33 10 55 -33 26 17 -33 9 39 0.32 -174 0 0 -33 1 19 1 0 49.6 14 256 69 -33 8 23 -32 54 16 -33 9 39 -32 52 59 0.32 -173 0 0 -32 44 21 1 0 50.3 13 255 68 -32 51 25 -32 37 17 -32 52 42 -32 36 0 0.32 -172 0 0 -32 27 3 1 0 51.0 12 255 68 -32 34 8 -32 19 59 -32 35 25 -32 18 42 0.32 -171 0 0 -32 9 26 1 0 51.6 11 254 67 -32 16 32 -32 2 21 -32 17 49 -32 1 4 0.32 -170 0 0 -31 51 30 1 0 52.2 10 254 67 -31 58 36 -31 44 24 -31 59 54 -31 43 7 0.32 -169 0 0 -31 33 15 1 0 52.7 9 253 66 -31 40 22 -31 26 8 -31 41 39 -31 24 51 0.33 -168 0 0 -31 14 40 1 0 53.2 8 253 65 -31 21 48 -31 7 33 -31 23 6 -31 6 15 0.33 -167 0 0 -30 55 47 1 0 53.7 7 252 65 -31 2 56 -30 48 39 -31 4 13 -30 47 22 0.34 -166 0 0 -30 36 36 1 0 54.1 6 251 64 -30 43 45 -30 29 27 -30 45 3 -30 28 9 0.34 -165 0 0 -30 17 6 1 0 54.4 5 251 63 -30 24 16 -30 9 57 -30 25 34 -30 8 39 0.35 -164 0 0 -29 57 18 1 0 54.7 4 250 62 -30 4 29 -29 50 8 -30 5 47 -29 48 50 0.36 -163 0 0 -29 37 13 1 0 54.9 4 250 62 -29 44 24 -29 30 2 -29 45 42 -29 28 44 0.38 -162 0 0 -29 16 50 1 0 55.1 3 249 61 -29 24 2 -29 9 38 -29 25 20 -29 8 20 0.40 -161 0 0 -28 56 10 1 0 55.2 2 249 60 -29 3 22 -28 48 57 -29 4 40 -28 47 39 0.46 -160 0 0 -28 35 12 1 0 55.3 1 249 59 -28 42 25 -28 28 0 -28 43 44 -28 26 41 0.68 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: TYC 6193-00535-1 * constellation : Libra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 15 43 21.9899 DE: -19 04 34.361 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 15 43 21.9899 DE: -19 04 34.361 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.100) * V mag [mag]: 10.1 * B mag [mag]: 10.8 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (2505) Hebei asteroid class: approx. diameter [km]: 23 approx. diameter ["]: 0.011 distance from Earth [AU]: 3.02970 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#56 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): 0.020", 0.001", 105.074° remarks: * orbital elements for (2505)Hebei : Mean anomaly = 326.3700563451 deg Arg. of pericenter = 206.7332380888 deg Long. of node = 59.2283407435 deg Inclination = 2.0772578870 deg Eccentricity = 0.1720248973 Semimajor axis = 3.1459222339 AU Perihelion dist = 2.6047452845 AU Mag: H = 11.75, G = 0.15 Epoch of elements : MJD 60331.04013008 TDT (2024 Jan 22.0401) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#562023Apr24,0.73,2024,1,22,0.963123,-0.065891,-0.274914,17.830318,-4.291046,-0.005144,0.001196,-0.000001,0.000000 100.8474,-19.1522,168.38,-19.83,False TYC 6193-00535-1,15.72277492,-19.0762112,10.75,10.08,9.72,0.1,0,,15.74559123,-19.1521651,7.22,7.13,0,0,0 2505,Hebei,17.30,23.701,3.0297,0,0,3.654,-12.46,,1.2,0 0,326.1863,2024,1,21,206.7332,59.2283,2.0773,0.17202,3.14592,2.60475,11.75,5.0,0.15 1.090,0.0197,0.0008,105,0.0010,Known errors,1.05,0,-1,-1 20240122_0535-1,60137.03 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 12, 00:36 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org