IOTA/IOTA-ES occultation update for (667) Denise / TYC 199-01534-1 event on 2024 Sep 23, 07:45 UT Visible from Summary ------- On 2024 Sep 23 UT, the 88.878 km diameter asteroid (667) Denise will occult a 10.6 mag star in the constellation Hydra for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 4.29 mag to 14.86 mag (the magnitude of the asteroid) for at most 2.610 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 Sep 23, 07:41 - 2024 Sep 23, 07:48 * geocentric midpoint of event [JD]: 2460576.82297505 * magnitude of target star: 10.59 * magnitude drop [mag]: 4.29 * estimated maximum duration [s]: 2.610 * Moon: 66 % sunlit, 57° distance * Sun: 57° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 90 * 1 sigma uncertainty interval [path widths]: +/- 0.22 * 1 sigma uncertainty interval [seconds]: +/- 1.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.023, +/- 0.004) * 1 sigma uncertainty ellipse (major, minor, PA): (0.023", 0.002", 80°) * approx speed of asteroid's shadow [km/s]: 34.0060 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 199-01534-1 by 667 Denise on 2024 Sep 23 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 - 84 0 0 2 54 33 7 42 0.0 0 87 -56 2 30 3 3 19 0 2 19 28 3 29 34 .... - 83 0 0 2 57 16 7 42 0.1 1 87 -55 2 32 47 3 21 43 2 22 11 3 32 17 0.09 - 82 0 0 2 59 45 7 42 0.2 2 87 -54 2 35 17 3 24 12 2 24 41 3 34 46 0.12 - 81 0 0 3 2 1 7 42 0.4 3 87 -53 2 37 32 3 26 28 2 26 57 3 37 1 0.14 - 80 0 0 3 4 2 7 42 0.6 4 87 -52 2 39 34 3 28 29 2 28 59 3 39 3 0.15 - 79 0 0 3 5 50 7 42 0.9 5 88 -51 2 41 22 3 30 17 2 30 47 3 40 50 0.15 - 78 0 0 3 7 24 7 42 1.2 6 88 -50 2 42 56 3 31 50 2 32 20 3 42 24 0.15 - 77 0 0 3 8 44 7 42 1.6 7 88 -49 2 44 16 3 33 10 2 33 40 3 43 43 0.15 - 76 0 0 3 9 49 7 42 2.1 8 88 -48 2 45 21 3 34 15 2 34 46 3 44 49 0.16 - 75 0 0 3 10 41 7 42 2.6 9 88 -47 2 46 13 3 35 7 2 35 38 3 45 40 0.16 - 74 0 0 3 11 18 7 42 3.1 10 88 -46 2 46 50 3 35 44 2 36 15 3 46 17 0.16 - 73 0 0 3 11 41 7 42 3.8 11 88 -45 2 47 14 3 36 7 2 36 39 3 46 41 0.16 - 72 0 0 3 11 51 7 42 4.4 12 88 -44 2 47 23 3 36 17 2 36 48 3 46 50 0.16 - 71 0 0 3 11 46 7 42 5.2 13 88 -43 2 47 18 3 36 12 2 36 43 3 46 45 0.16 - 70 0 0 3 11 26 7 42 6.0 14 88 -42 2 46 59 3 35 52 2 36 23 3 46 26 0.16 - 69 0 0 3 10 53 7 42 6.8 15 88 -41 2 46 25 3 35 19 2 35 50 3 45 53 0.16 - 68 0 0 3 10 6 7 42 7.7 16 88 -40 2 45 38 3 34 32 2 35 2 3 45 5 0.16 - 67 0 0 3 9 4 7 42 8.7 17 88 -39 2 44 36 3 33 30 2 34 1 3 44 4 0.16 - 66 0 0 3 7 48 7 42 9.7 18 88 -38 2 43 20 3 32 15 2 32 45 3 42 48 0.16 - 65 0 0 3 6 18 7 42 10.8 19 88 -37 2 41 50 3 30 45 2 31 15 3 41 19 0.16 - 64 0 0 3 4 34 7 42 11.9 20 88 -36 2 40 6 3 29 1 2 29 30 3 39 35 0.16 - 63 0 0 3 2 36 7 42 13.1 21 88 -35 2 38 7 3 27 3 2 27 32 3 37 37 0.16 - 62 0 0 3 0 24 7 42 14.4 22 88 -34 2 35 55 3 24 51 2 25 19 3 35 25 0.17 - 61 0 0 2 57 58 7 42 15.7 23 88 -33 2 33 28 3 22 25 2 22 53 3 32 59 0.17 - 60 0 0 2 55 17 7 42 17.0 24 88 -32 2 30 48 3 19 45 2 20 12 3 30 19 0.17 - 59 0 0 2 52 23 7 42 18.4 25 88 -31 2 27 53 3 16 51 2 17 17 3 27 25 0.17 - 58 0 0 2 49 14 7 42 19.9 26 88 -30 2 24 44 3 13 43 2 14 8 3 24 17 0.17 - 57 0 0 2 45 52 7 42 21.4 27 88 -29 2 21 22 3 10 21 2 10 45 3 20 55 0.17 - 56 0 0 2 42 16 7 42 23.0 28 88 -28 2 17 45 3 6 45 2 7 9 3 17 20 0.17 - 55 0 0 2 38 26 7 42 24.6 29 88 -27 2 13 55 3 2 55 2 3 18 3 13 30 0.17 - 54 0 0 2 34 22 7 42 26.2 30 88 -26 2 9 51 2 58 52 1 59 14 3 9 27 0.17 - 53 0 0 2 30 4 7 42 28.0 31 88 -25 2 5 33 2 54 35 1 54 56 3 5 10 0.17 - 52 0 0 2 25 33 7 42 29.7 32 88 -24 2 1 1 2 50 4 1 50 24 3 0 39 0.17 - 51 0 0 2 20 48 7 42 31.5 33 88 -23 1 56 16 2 45 19 1 45 38 2 55 55 0.17 - 50 0 0 2 15 50 7 42 33.4 34 88 -22 1 51 17 2 40 21 1 40 39 2 50 57 0.17 - 49 0 0 2 10 38 7 42 35.3 35 88 -21 1 46 4 2 35 10 1 35 27 2 45 46 0.17 - 48 0 0 2 5 13 7 42 37.3 36 88 -20 1 40 38 2 29 45 1 30 0 2 40 21 0.17 - 47 0 0 1 59 34 7 42 39.3 37 88 -19 1 34 59 2 24 7 1 24 21 2 34 43 0.17 - 46 0 0 1 53 42 7 42 41.4 38 88 -18 1 29 7 2 18 16 1 18 28 2 28 52 0.17 - 45 0 0 1 47 37 7 42 43.5 39 88 -17 1 23 1 2 12 11 1 12 23 2 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0.17 82 0 0 -21 15 10 7 48 6.8 10 277 61 -21 39 42 -20 50 39 -21 50 20 -20 40 3 0.17 83 0 0 -21 20 19 7 48 7.3 9 277 60 -21 44 51 -20 55 49 -21 55 28 -20 45 13 0.17 84 0 0 -21 25 16 7 48 7.8 9 276 59 -21 49 47 -21 0 46 -22 0 24 -20 50 11 0.17 85 0 0 -21 30 0 7 48 8.3 8 276 58 -21 54 31 -21 5 31 -22 5 8 -20 54 56 0.17 86 0 0 -21 34 32 7 48 8.6 7 276 58 -21 59 3 -21 10 3 -22 9 39 -20 59 28 0.17 87 0 0 -21 38 51 7 48 9.0 6 275 57 -22 3 22 -21 14 23 -22 13 58 -21 3 48 0.18 88 0 0 -21 42 58 7 48 9.3 5 275 56 -22 7 28 -21 18 30 -22 18 4 -21 7 55 0.18 89 0 0 -21 46 52 7 48 9.5 4 275 55 -22 11 21 -21 22 24 -22 21 57 -21 11 50 0.18 90 0 0 -21 50 33 7 48 9.7 3 274 55 -22 15 2 -21 26 5 -22 25 38 -21 15 31 0.19 91 0 0 -21 54 1 7 48 9.8 2 274 54 -22 18 30 -21 29 34 -22 29 6 -21 19 0 0.19 92 0 0 -21 57 17 7 48 9.9 1 273 53 -22 21 45 -21 32 50 -22 32 21 -21 22 16 0.22 93 0 0 -22 0 20 7 48 9.9 0 273 52 -22 24 48 -21 35 53 -22 35 23 -21 25 20 0.65 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.6 Data for the target star ------------------------ * name: TYC 199-01534-1 * constellation : Hydra * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 08 14 27.9627 DE: +02 50 10.792 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 08 14 27.9628 DE: +02 50 10.792 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 10.6 * B mag [mag]: 10.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (667) Denise asteroid class: approx. diameter [km]: 89 approx. diameter ["]: 0.041 distance from Earth [AU]: 2.99760 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#60 date of fit: 2023 Apr 27 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): 0.023", 0.002", 80.161° remarks: * orbital elements for (667)Denise : Mean anomaly = 3.0834647142 deg Arg. of pericenter = 304.9191392340 deg Long. of node = 153.1447042648 deg Inclination = 25.3670080980 deg Eccentricity = 0.1884080159 Semimajor axis = 3.1881537156 AU Perihelion dist = 2.5874799996 AU Mag: H = 9.45, G = 0.15 Epoch of elements : MJD 60576.32297446 TDT (2024 Sep 23.3230) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#602023Apr27,2.61,2024,9,23,7.751401,-0.035321,-0.161437,18.746995,-4.117820,-0.004689,0.000164,-0.000001,0.000000 5.0121,2.7642,61.79,-0.31,False TYC 199-01534-1,8.24110070,2.8363310,10.84,10.59,10.46,0.0,0,,8.26237654,2.7641669,4.30,3.99,0,0,0 667,Denise,14.86,88.878,2.9976,0,0,3.672,-12.09,,5.0,0 0,3.0275,2024,9,23,304.9191,153.1447,25.3670,0.18841,3.18815,2.58748,9.45,5.0,0.15 1.216,0.0230,0.0017,80,0.0088,Known errors,1.25,0,-1,-1 20240923_1534-1,60140.58 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 13:55 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org