IOTA/IOTA-ES occultation update for (4245) Nairc / TYC 6814-01057-1 event on 2024 Jun 10, 01:28 UT Visible from Summary ------- On 2024 Jun 10 UT, the 10.429 km diameter asteroid (4245) Nairc will occult a 11.6 mag star in the constellation Ophiuchus for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 5.72 mag to 17.27 mag (the magnitude of the asteroid) for at most 0.890 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: 99 * date and approx. time of event: 2024 Jun 10, 01:20 - 2024 Jun 10, 01:37 * geocentric midpoint of event [JD]: 2460471.56174987 * magnitude of target star: 11.56 * magnitude drop [mag]: 5.72 * estimated maximum duration [s]: 0.890 * Moon: 14 % sunlit, 134° distance * Sun: 175° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 11 * 1 sigma uncertainty interval [path widths]: +/- 0.12 * 1 sigma uncertainty interval [seconds]: +/- 1.5 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.002) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.001", 97°) * approx speed of asteroid's shadow [km/s]: 11.7836 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6814-01057-1 by 4245 Nairc on 2024 Jun 10 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 -109 0 0 17 28 7 1 37 39.5 1 117 2 17 31 25 17 24 49 17 32 12 17 24 2 .... -108 0 0 16 58 23 1 37 39.3 2 118 1 17 1 41 16 55 5 17 2 28 16 54 18 -0.09 -107 0 0 16 28 35 1 37 38.9 3 118 0 16 31 53 16 25 17 16 32 40 16 24 30 -0.16 -106 0 0 15 58 43 1 37 38.3 4 118 -1 16 2 1 15 55 26 16 2 48 15 54 39 -0.19 -105 0 0 15 28 49 1 37 37.6 5 119 -2 15 32 7 15 25 31 15 32 53 15 24 44 -0.21 -104 0 0 14 58 52 1 37 36.6 6 119 -4 15 2 10 14 55 34 15 2 57 14 54 47 -0.22 -103 0 0 14 28 54 1 37 35.4 7 119 -5 14 32 12 14 25 37 14 32 59 14 24 50 -0.23 -102 0 0 13 58 56 1 37 34.0 8 119 -6 14 2 14 13 55 39 14 3 1 13 54 52 -0.23 -101 0 0 13 28 59 1 37 32.4 9 120 -7 13 32 16 13 25 41 13 33 3 13 24 54 -0.24 -100 0 0 12 59 2 1 37 30.6 10 120 -8 13 2 20 12 55 45 13 3 6 12 54 58 -0.24 - 99 0 0 12 29 8 1 37 28.6 11 120 -9 12 32 25 12 25 51 12 33 12 12 25 4 -0.25 - 98 0 0 11 59 17 1 37 26.4 12 120 -10 12 2 34 11 56 0 12 3 21 11 55 13 -0.25 - 97 0 0 11 29 29 1 37 24.0 14 120 -11 11 32 46 11 26 13 11 33 33 11 25 26 -0.25 - 96 0 0 10 59 47 1 37 21.5 15 121 -12 11 3 3 10 56 30 11 3 50 10 55 43 -0.25 - 95 0 0 10 30 9 1 37 18.7 16 121 -13 10 33 26 10 26 53 10 34 12 10 26 6 -0.25 - 94 0 0 10 0 38 1 37 15.7 17 121 -14 10 3 54 9 57 22 10 4 41 9 56 35 -0.25 - 93 0 0 9 31 13 1 37 12.5 18 121 -16 9 34 30 9 27 57 9 35 16 9 27 11 -0.25 - 92 0 0 9 1 57 1 37 9.2 19 121 -17 9 5 13 8 58 41 9 5 59 8 57 55 -0.26 - 91 0 0 8 32 49 1 37 5.7 20 122 -18 8 36 4 8 29 33 8 36 51 8 28 47 -0.26 - 90 0 0 8 3 50 1 37 1.9 21 122 -19 8 7 5 8 0 34 8 7 52 7 59 48 -0.26 - 89 0 0 7 35 1 1 36 58.0 22 122 -20 7 38 16 7 31 46 7 39 2 7 30 59 -0.26 - 88 0 0 7 6 22 1 36 53.9 23 122 -21 7 9 37 7 3 8 7 10 23 7 2 21 -0.26 - 87 0 0 6 37 55 1 36 49.7 24 122 -22 6 41 10 6 34 41 6 41 56 6 33 55 -0.26 - 86 0 0 6 9 40 1 36 45.2 25 122 -23 6 12 55 6 6 26 6 13 41 6 5 40 -0.26 - 85 0 0 5 41 38 1 36 40.6 27 123 -24 5 44 52 5 38 24 5 45 38 5 37 38 -0.26 - 84 0 0 5 13 49 1 36 35.8 28 123 -25 5 17 3 5 10 36 5 17 49 5 9 50 -0.26 - 83 0 0 4 46 14 1 36 30.9 29 123 -26 4 49 27 4 43 1 4 50 13 4 42 15 -0.26 - 82 0 0 4 18 54 1 36 25.8 30 123 -27 4 22 7 4 15 41 4 22 52 4 14 55 -0.26 - 81 0 0 3 51 48 1 36 20.5 31 123 -28 3 55 1 3 48 36 3 55 47 3 47 50 -0.26 - 80 0 0 3 24 59 1 36 15.0 32 123 -30 3 28 11 3 21 47 3 28 57 3 21 1 -0.26 - 79 0 0 2 58 26 1 36 9.5 33 124 -31 3 1 38 2 55 14 3 2 23 2 54 28 -0.26 - 78 0 0 2 32 9 1 36 3.7 34 124 -32 2 35 21 2 28 58 2 36 6 2 28 12 -0.26 - 77 0 0 2 6 10 1 35 57.8 35 124 -33 2 9 21 2 2 59 2 10 6 2 2 13 -0.26 - 76 0 0 1 40 29 1 35 51.8 36 124 -34 1 43 40 1 37 18 1 44 25 1 36 33 -0.26 - 75 0 0 1 15 6 1 35 45.7 37 124 -35 1 18 16 1 11 55 1 19 1 1 11 10 -0.26 - 74 0 0 0 50 2 1 35 39.4 38 124 -36 0 53 12 0 46 52 0 53 57 0 46 7 -0.26 - 73 0 0 0 25 17 1 35 32.9 39 125 -37 0 28 26 0 22 7 0 29 11 0 21 22 -0.26 - 72 0 0 0 0 51 1 35 26.4 40 125 -38 0 4 1 - 0 2 18 0 4 46 - 0 3 3 -0.26 - 71 0 0 - 0 23 14 1 35 19.7 41 125 -39 - 0 20 5 - 0 26 23 - 0 19 20 - 0 27 7 -0.26 - 70 0 0 - 0 46 58 1 35 12.9 42 125 -40 - 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7 13 6 - 7 19 9 - 7 12 23 - 7 19 52 -0.26 24 0 0 - 6 59 50 1 22 23.0 40 242 -44 - 6 56 48 - 7 2 52 - 6 56 4 - 7 3 35 -0.26 25 0 0 - 6 43 6 1 22 16.8 39 242 -43 - 6 40 4 - 6 46 8 - 6 39 20 - 6 46 52 -0.26 26 0 0 - 6 25 57 1 22 10.7 38 242 -42 - 6 22 54 - 6 29 0 - 6 22 11 - 6 29 43 -0.26 27 0 0 - 6 8 22 1 22 4.6 37 242 -41 - 6 5 19 - 6 11 25 - 6 4 36 - 6 12 9 -0.26 28 0 0 - 5 50 23 1 21 58.7 36 242 -40 - 5 47 19 - 5 53 26 - 5 46 36 - 5 54 9 -0.26 29 0 0 - 5 31 57 1 21 53.0 35 242 -39 - 5 28 54 - 5 35 1 - 5 28 10 - 5 35 45 -0.26 30 0 0 - 5 13 7 1 21 47.3 34 242 -38 - 5 10 3 - 5 16 11 - 5 9 19 - 5 16 55 -0.27 31 0 0 - 4 53 52 1 21 41.8 33 242 -37 - 4 50 47 - 4 56 57 - 4 50 4 - 4 57 40 -0.27 32 0 0 - 4 34 12 1 21 36.4 32 242 -36 - 4 31 7 - 4 37 17 - 4 30 23 - 4 38 1 -0.27 33 0 0 - 4 14 8 1 21 31.1 31 242 -35 - 4 11 2 - 4 17 13 - 4 10 18 - 4 17 57 -0.27 34 0 0 - 3 53 39 1 21 26.0 30 242 -34 - 3 50 33 - 3 56 44 - 3 49 49 - 3 57 29 -0.27 35 0 0 - 3 32 46 1 21 21.0 29 242 -33 - 3 29 40 - 3 35 52 - 3 28 56 - 3 36 36 -0.27 36 0 0 - 3 11 29 1 21 16.2 28 242 -32 - 3 8 23 - 3 14 36 - 3 7 38 - 3 15 20 -0.27 37 0 0 - 2 49 49 1 21 11.5 27 242 -31 - 2 46 42 - 2 52 56 - 2 45 57 - 2 53 40 -0.27 38 0 0 - 2 27 45 1 21 7.0 26 242 -30 - 2 24 38 - 2 30 52 - 2 23 53 - 2 31 36 -0.27 39 0 0 - 2 5 18 1 21 2.6 25 242 -29 - 2 2 10 - 2 8 25 - 2 1 26 - 2 9 10 -0.27 40 0 0 - 1 42 28 1 20 58.4 24 242 -28 - 1 39 20 - 1 45 36 - 1 38 35 - 1 46 21 -0.27 41 0 0 - 1 19 16 1 20 54.3 23 242 -27 - 1 16 7 - 1 22 24 - 1 15 23 - 1 23 9 -0.27 42 0 0 - 0 55 41 1 20 50.4 22 242 -26 - 0 52 33 - 0 58 50 - 0 51 48 - 0 59 35 -0.27 43 0 0 - 0 31 45 1 20 46.7 21 242 -25 - 0 28 36 - 0 34 54 - 0 27 51 - 0 35 39 -0.27 44 0 0 - 0 7 28 1 20 43.1 20 242 -24 - 0 4 18 - 0 10 37 - 0 3 33 - 0 11 22 -0.27 45 0 0 0 17 11 1 20 39.7 19 242 -23 0 20 21 0 14 1 0 21 6 0 13 16 -0.27 46 0 0 0 42 10 1 20 36.5 17 243 -21 0 45 21 0 39 0 0 46 6 0 38 15 -0.27 47 0 0 1 7 30 1 20 33.4 16 243 -20 1 10 41 1 4 19 1 11 26 1 3 34 -0.27 48 0 0 1 33 9 1 20 30.6 15 243 -19 1 36 20 1 29 58 1 37 6 1 29 12 -0.27 49 0 0 1 59 7 1 20 27.9 14 243 -18 2 2 19 1 55 56 2 3 4 1 55 10 -0.27 50 0 0 2 25 24 1 20 25.4 13 243 -17 2 28 36 2 22 12 2 29 22 2 21 27 -0.27 51 0 0 2 52 0 1 20 23.1 12 243 -16 2 55 12 2 48 48 2 55 58 2 48 2 -0.27 52 0 0 3 18 53 1 20 21.0 11 243 -15 3 22 6 3 15 40 3 22 52 3 14 55 -0.27 53 0 0 3 46 3 1 20 19.0 10 243 -14 3 49 16 3 42 50 3 50 2 3 42 4 -0.27 54 0 0 4 13 30 1 20 17.3 9 243 -13 4 16 44 4 10 17 4 17 30 4 9 31 -0.27 55 0 0 4 41 13 1 20 15.8 8 243 -12 4 44 27 4 37 59 4 45 13 4 37 13 -0.27 56 0 0 5 9 11 1 20 14.4 7 243 -11 5 12 25 5 5 57 5 13 12 5 5 11 -0.27 57 0 0 5 37 24 1 20 13.3 6 243 -10 5 40 39 5 34 10 5 41 25 5 33 24 -0.27 58 0 0 6 5 51 1 20 12.4 4 243 -8 6 9 6 6 2 36 6 9 52 6 1 50 -0.27 59 0 0 6 34 31 1 20 11.6 3 243 -7 6 37 47 6 31 16 6 38 33 6 30 30 -0.27 60 0 0 7 3 24 1 20 11.1 2 244 -6 7 6 40 7 0 9 7 7 26 6 59 23 -0.27 61 0 0 7 32 29 1 20 10.8 1 244 -5 7 35 45 7 29 14 7 36 32 7 28 27 -0.27 62 0 0 8 1 46 1 20 10.7 0 244 -4 8 5 2 7 58 30 8 5 48 7 57 43 -0.15 Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 14.4 Data for the target star ------------------------ * name: TYC 6814-01057-1 * constellation : Ophiuchus * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 16 58 04.7745 DE: -25 50 10.764 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 16 58 04.7744 DE: -25 50 10.764 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.6 * B mag [mag]: 11.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (4245) Nairc asteroid class: approx. diameter [km]: 10 approx. diameter ["]: 0.009 distance from Earth [AU]: 1.55980 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#43 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): 0.016", 0.001", 97.3° remarks: * orbital elements for (4245)Nairc : Mean anomaly = 248.6470652214 deg Arg. of pericenter = 26.1456587089 deg Long. of node = 359.0099450709 deg Inclination = 1.9425368677 deg Eccentricity = 0.1679919995 Semimajor axis = 2.3753112114 AU Perihelion dist = 1.9762779315 AU Mag: H = 14.03, G = 0.15 Epoch of elements : MJD 60471.06174975 TDT (2024 Jun 10.0617) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#432023Apr24,0.89,2024,6,10,1.481997,0.023152,0.245615,-6.621670,0.624097,0.000365,0.000262,0.000001,0.000000 -26.2303,-25.8749,157.65,23.04,False TYC 6814-01057-1,16.96799290,-25.8363234,11.87,11.56,11.39,0.0,0,,16.99342581,-25.8749273,5.71,5.43,0,0,0 4245,Nairc,17.27,10.429,1.5598,0,0,-2.766,3.52,,0.8,0 0,248.3612,2024,6,9,26.1457,359.0099,1.9425,0.16799,2.37531,1.97628,14.03,5.0,0.15 1.119,0.0157,0.0010,97,0.0011,Known errors,0.98,0,-1,-1 20240610_1057-1,60139.38 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 14, 09:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org