IOTA/IOTA-ES occultation update for (421) Zahringia / HIP 68754 event on 2024 Jan 18, 00:13 UT Visible from Summary ------- On 2024 Jan 18 UT, the 13.2746139276016 km diameter asteroid (421) Zahringia will occult a 9.1 mag star in the constellation Virgo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 8.46 mag to 17.51 mag (the magnitude of the asteroid) for at most 0.830 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: 68 * date and approx. time of event: 2024 Jan 18, 00:07 - 2024 Jan 18, 00:20 * geocentric midpoint of event [JD]: 2460327.50957008 * magnitude of target star: 9.05 * magnitude drop [mag]: 8.46 * estimated maximum duration [s]: 0.830 * Moon: 48 % sunlit, 171° distance * Sun: 84° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 14 * 1 sigma uncertainty interval [path widths]: +/- 0.87 * 1 sigma uncertainty interval [seconds]: +/- 1.1 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.007, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.008", 0.004", 125°) * approx speed of asteroid's shadow [km/s]: 16.3109 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of HIP 68754 by 421 Zahringia on 2024 Jan 18 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 5 0 0 6 56 34 0 7 17.1 1 102 -76 6 52 49 7 0 19 6 46 21 7 6 47 .... 6 0 0 6 43 51 0 7 17.2 2 102 -75 6 40 6 6 47 36 6 33 38 6 54 4 0.10 7 0 0 6 30 55 0 7 17.5 3 102 -75 6 27 9 6 34 40 6 20 41 6 41 9 0.09 8 0 0 6 17 46 0 7 17.9 4 102 -74 6 14 0 6 21 31 6 7 31 6 28 0 0.09 9 0 0 6 4 24 0 7 18.5 5 102 -73 6 0 38 6 8 9 5 54 9 6 14 38 0.09 10 0 0 5 50 49 0 7 19.1 6 102 -73 5 47 3 5 54 35 5 40 34 6 1 4 0.09 11 0 0 5 37 2 0 7 19.9 7 102 -72 5 33 15 5 40 48 5 26 46 5 47 17 0.09 12 0 0 5 23 2 0 7 20.8 8 103 -71 5 19 16 5 26 49 5 12 46 5 33 18 0.08 13 0 0 5 8 51 0 7 21.9 9 103 -70 5 5 4 5 12 37 4 58 34 5 19 7 0.08 14 0 0 4 54 28 0 7 23.0 10 103 -70 4 50 41 4 58 14 4 44 11 5 4 44 0.08 15 0 0 4 39 53 0 7 24.3 11 103 -69 4 36 6 4 43 40 4 29 36 4 50 10 0.08 16 0 0 4 25 7 0 7 25.8 12 103 -68 4 21 20 4 28 54 4 14 49 4 35 25 0.08 17 0 0 4 10 10 0 7 27.3 13 103 -67 4 6 23 4 13 57 3 59 52 4 20 28 0.08 18 0 0 3 55 2 0 7 29.0 14 103 -66 3 51 15 3 58 50 3 44 44 4 5 21 0.08 19 0 0 3 39 44 0 7 30.8 15 103 -65 3 35 57 3 43 32 3 29 25 3 50 3 0.08 20 0 0 3 24 16 0 7 32.7 16 103 -64 3 20 28 3 28 4 3 13 56 3 34 35 0.08 21 0 0 3 8 38 0 7 34.8 17 103 -64 3 4 50 3 12 26 2 58 18 3 18 57 0.08 22 0 0 2 52 50 0 7 36.9 18 103 -63 2 49 2 2 56 38 2 42 30 3 3 10 0.08 23 0 0 2 36 53 0 7 39.3 19 103 -62 2 33 5 2 40 41 2 26 32 2 47 13 0.08 24 0 0 2 20 47 0 7 41.7 20 103 -61 2 16 58 2 24 35 2 10 26 2 31 8 0.08 25 0 0 2 4 32 0 7 44.2 21 103 -60 2 0 44 2 8 20 1 54 10 2 14 53 0.08 26 0 0 1 48 9 0 7 46.9 23 103 -59 1 44 20 1 51 57 1 37 47 1 58 30 0.08 27 0 0 1 31 38 0 7 49.7 24 103 -58 1 27 49 1 35 26 1 21 15 1 41 59 0.08 28 0 0 1 14 59 0 7 52.7 25 103 -57 1 11 10 1 18 47 1 4 36 1 25 21 0.08 29 0 0 0 58 12 0 7 55.7 26 103 -56 0 54 23 1 2 1 0 47 50 1 8 35 0.08 30 0 0 0 41 19 0 7 58.9 27 103 -55 0 37 30 0 45 8 0 30 56 0 51 42 0.08 31 0 0 0 24 19 0 8 2.2 28 103 -54 0 20 30 0 28 8 0 13 56 0 34 42 0.08 32 0 0 0 7 13 0 8 5.6 29 103 -53 0 3 23 0 11 2 - 0 3 11 0 17 36 0.08 33 0 0 - 0 10 0 0 8 9.1 30 103 -52 - 0 13 49 - 0 6 10 - 0 20 23 0 0 24 0.08 34 0 0 - 0 27 17 0 8 12.8 31 103 -51 - 0 31 7 - 0 23 28 - 0 37 42 - 0 16 53 0.08 35 0 0 - 0 44 41 0 8 16.6 32 103 -50 - 0 48 30 - 0 40 51 - 0 55 5 - 0 34 16 0.08 36 0 0 - 1 2 8 0 8 20.4 33 103 -49 - 1 5 58 - 0 58 19 - 1 12 33 - 0 51 44 0.08 37 0 0 - 1 19 41 0 8 24.4 34 103 -48 - 1 23 30 - 1 15 51 - 1 30 6 - 1 9 16 0.08 38 0 0 - 1 37 17 0 8 28.6 35 103 -47 - 1 41 7 - 1 33 28 - 1 47 42 - 1 26 53 0.08 39 0 0 - 1 54 58 0 8 32.8 36 103 -46 - 1 58 47 - 1 51 8 - 2 5 23 - 1 44 33 0.08 40 0 0 - 2 12 41 0 8 37.1 37 103 -45 - 2 16 31 - 2 8 51 - 2 23 6 - 2 2 16 0.08 41 0 0 - 2 30 27 0 8 41.6 38 103 -44 - 2 34 17 - 2 26 38 - 2 40 53 - 2 20 2 0.08 42 0 0 - 2 48 16 0 8 46.1 39 103 -43 - 2 52 6 - 2 44 26 - 2 58 42 - 2 37 51 0.08 43 0 0 - 3 6 7 0 8 50.8 40 103 -42 - 3 9 57 - 3 2 17 - 3 16 33 - 2 55 42 0.08 44 0 0 - 3 24 0 0 8 55.5 42 103 -41 - 3 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52 4 -18 5 54 -17 45 40 0.08 169 0 0 -17 46 37 0 20 6.3 13 262 81 -17 50 20 -17 42 54 -17 56 44 -17 36 30 0.08 170 0 0 -17 37 12 0 20 7.8 12 262 82 -17 40 55 -17 33 28 -17 47 19 -17 27 4 0.08 171 0 0 -17 27 32 0 20 9.2 11 261 83 -17 31 15 -17 23 48 -17 37 40 -17 17 24 0.09 172 0 0 -17 17 38 0 20 10.4 10 261 84 -17 21 21 -17 13 54 -17 27 46 -17 7 29 0.09 173 0 0 -17 7 29 0 20 11.6 9 261 84 -17 11 13 -17 3 45 -17 17 38 -16 57 20 0.09 174 0 0 -16 57 6 0 20 12.6 8 260 85 -17 0 50 -16 53 22 -17 7 15 -16 46 57 0.09 175 0 0 -16 46 29 0 20 13.6 7 260 85 -16 50 13 -16 42 45 -16 56 38 -16 36 19 0.09 176 0 0 -16 35 38 0 20 14.4 7 260 85 -16 39 22 -16 31 54 -16 45 48 -16 25 28 0.09 177 0 0 -16 24 33 0 20 15.1 6 259 85 -16 28 17 -16 20 49 -16 34 44 -16 14 23 0.10 178 0 0 -16 13 15 0 20 15.7 5 259 85 -16 16 59 -16 9 30 -16 23 26 -16 3 4 0.10 179 0 0 -16 1 43 0 20 16.2 4 259 85 -16 5 28 -15 57 58 -16 11 54 -15 51 32 0.11 180 0 0 -15 49 58 0 20 16.5 3 259 84 -15 53 43 -15 46 13 -16 0 10 -15 39 46 0.12 -179 0 0 -15 38 0 0 20 16.8 2 258 84 -15 41 45 -15 34 15 -15 48 12 -15 27 48 0.15 -178 0 0 -15 25 49 0 20 16.9 1 258 83 -15 29 34 -15 22 4 -15 36 2 -15 15 36 0.27 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: HIP 68754 * constellation : Virgo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 14 04 23.0517 DE: -11 29 41.999 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 14 04 23.0519 DE: -11 29 42.000 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 9.1 * B mag [mag]: 9.7 * Diameter [mas]: 0.10 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (421) Zahringia asteroid class: approx. diameter [km]: 13 approx. diameter ["]: 0.006 distance from Earth [AU]: 3.12140 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#50 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): 0.008", 0.004", 124.535° remarks: * orbital elements for (421)Zahringia : Mean anomaly = 144.0403612909 deg Arg. of pericenter = 209.0384132441 deg Long. of node = 187.3522875634 deg Inclination = 7.7879870401 deg Eccentricity = 0.2828281105 Semimajor axis = 2.5419010163 AU Perihelion dist = 1.8229799549 AU Mag: H = 11.60, G = 0.15 Epoch of elements : MJD 60327.00957013 TDT (2024 Jan 18.0096) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#502023Apr24,0.83,2024,1,18,0.229682,-0.014577,-0.070945,9.025493,-1.815859,-0.005652,0.002051,0.000000,0.000000 91.0539,-11.6101,179.08,-20.68,False HIP 68754,14.07306990,-11.4949996,9.66,9.05,8.72,0.1,0,,14.09440179,-11.6100777,8.46,8.34,0,0,0 421,Zahringia,17.51,13.501,3.1214,0,0,1.731,-5.12,,1.0,0 0,143.7948,2024,1,17,209.0384,187.3523,7.7880,0.28283,2.54190,1.82298,11.60,5.0,0.15 1.860,0.0083,0.0043,125,0.0052,Known errors,0.97,0,-1,-1 20240118__68754,60137.02 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 12, 00:27 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org