Observationer av asteroidockultationer i Sverige

SAAF/Ockultationssektionen och Solsystemssektionen

Ver 1.0 Johan Warell 2014-03-27. Data från saaf.se, Astronet.

Ver 1.1 Johan Warell 2014-09-20. Data från individuella observatörer.

Ver 1.2 Lars Hermansson 2020-02-18. Komplettering av Lars Hermansson

Updaterad 2020-03-17. Bengt R

Updaterad 2020-11-02. Bengt R

Uppdaterad 2022-01-25 Lars H, Mats J

Updaterad 2022-03-17. Bengt R

Updaterad 2022-09-16. Bengt R

Information

Limhamn-Bunkeflo (55 35N, 12 57E)

Limhamn-Bunkeflo (55 35N, 12 57E)

Stjärna av mag 6. Mellan 1990 och 2000 följde ytterligare 16 negativa observationer av asteroidockultationer av Margareta, som jag tyvärr inte har koll på (JW)

22.08 - 23.01 UT... perfekt väder... alldeles helklar himmel hela tiden och bara svag vind. Inga problem alls att se stjärnan trots månljuset.

Start 003900.65 UT +/- 0.6 s, end 003911.35 +/-0.6 s (PE 0.34 s). P.E. of 0.34+-0.12 subtracted from the above timings. P.E. was estimated from a computer simulation of reaction time. Accuracy of +-0.6 is estimated incluing time sync error +-0.3s, P.E. variation and tape timing error +-0.1s (estimate from four timings). Duration of occultation is 10.70+-0.3 sec. Errors are all 1sigma std dev from tape measurements.

15 cm Newton f/5, x30

Station: Mjölkö Latitude: 59d27'44''+-3'' Longitude: 18d25'42''+-5'' Altitude: 8 m. Occ start 003855.76 +/- 0.4, end 003907.46 +/-0.4 s (PE 0.39 s). P.E. subtracted two times from the tape readout times (observation delay and tape readout delay). P.E. of 0.39+-0.06 was estimated from a computer simulation of reaction time. Accuracy of +-0.4 is estimated including: radio watch inaccuracy +-0.1s,time sync error +-0.1s, tape speed variation +-0.1s and P.E. variation +-0.1s. Duration of occultation was 11.70+-0.08 sec.

Start 003900.03 UT +/- 0.5s , end 003910.86 +/- 0.5s. CCD camera (DLR 2kx2k, 15 micron pix, 15-bit). Accuracy of timings above due to manual start of exposure and single-second precision of exposure mid-point UT information in FITS image header. Duration of occultation is 10.83+-0.10 sec based on measurement of CCD trail. In this error scintillation and seeing disk is included.

Kvistaberg 59d30'14''+-3'' Longitude: 17d36'30''+-5'' Altitude: 20 m. Occ start 003900.42 UT (+/- 1.11s Absolute 1sig timing error), end 003911.12 (+/- 1.16s). P.E. not included in above timings (not known). Duration of occultation is 10.70+-0.06 sec. Errors are all 1sigma std dev, obtained from four measurements with stopwatch from tape. Mean error of unknown P.E. not included. Atmospheric transparency: Good, Wind: Slightly windy, Star image stability : Fair, Temperature: +10 oC

Riala, 40 m.ö.h. 59g40m05s N 18g27m53s E

Väder: molnfritt, +12gr C, månen: avstånd 67g 87%, under horisonten. ockultationens början: 00t38m57,84s, ockultationens slut: 00t39m07,32s, ockultationens varaktighet: 9,48 sekunder, utan korrektion för reaktionstid. Även asterioden syntes till c:a 23.40 UT. Längre reaktionstid vid ockultationens början än vid slutet.

time.windows.com

QCam5 . Roma 2010 sannolikt partiell 2010/07/08 | 472 | Roma | HIP 79593 O+ | Bengt Rutersten | 21:55:02 | 21:58:02 | L101 | WEB | SE | E 18 04 58 | N 59 14 34 | 45 | |||||| | | | |Thin clouds, no reference star.Probable partial occultation < 50% = no chord, mid-event = 21:56:48, 5-10% drop.|;

QCam5 499 ms / frame. 14 sek dipp (28 * 0,499s = 13,97s) start = 18:50:16 UT (frame 25) - 29 s = 18:49:47 UT mid = 18:50:21 UT (frame 36) - 29 s = 18:49:52 UT end = 18:50:29 UT (frame 52) - 29 s = 18:50:00 UT

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