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Link to my video and images of this Regulus occultation
On Wednesday, May 23, 2007 the Earthmoon (48% lit) occults star Regulus on the bright daylight sky. In Woodquarter the occultation happens on southeast sky in an elevation of 48 degrees. In Woodquarter this occultation is a total one. The star will disappeare behind the dark side of the moon disk at 15h23 UTC and will reappear about 26 minutes later at 15h49 UTC on the bright moon limb. The sun will be than in an elevation of 30 degrees on western sky and in a distance of 87 degrees to the moon.
In a small zone across europe of few kilometers width this star occultation can be observed as a grazing one. There the star can disappear behind moon mountains and reappear through moon valleys several times.
About this grazing occultation an extra page exist with Data and interactive map about the path across Europe.
For a sucessfull observation of this occultation a telescope with at least 4 Inches (10cm) should be used. Never look in the sun with the telescope. Your eye would be damaged immediately and for ever.
Data table for total occultation in Woodquarter (all times in UTC)
Occultation Predictions for Nonndorf in Mai 2007
E.Long. 15 14 8.2 Lat. 48 47 13.5 Alt. 590m. T.dia 250mm. dMag 1.5
day Time P Star Sp Mag % Elon Sun Moon CA PA VA WA Libration A B RV Cct R.A. (J2000) Dec
y m d h m s No D V ill Alt Alt Az o o o o L B m/o m/o "/sec o h m s o m s
07 05 23 15 23 38 D 1487SB7 1.4 48+ 88 30 48 142 6S 194 219 176 +6.6 -1.0 -0.7-6.7 .124 -71 10 8 22.3 11 58 2
1487 = Regulus = alpha Leonis
1487 is triple : 1.3 8.1 175" 308.0 : 1.3 217" 274.0
Graze of 1487SB7 nearby at Lat = +47.76 -0.38(E.Long -15.24), CA = -13.1S
23 15 37 15 Gr 1487SB7 1.4 48+ 88 28 50 146
Closest distance to graze path is 99km at azimuth 210
07 05 23 15 49 42 R 1487SB7 1.4 48+ 88 26 50 151 -32S 233 252 214 +6.6 -1.0 +3.8+5.4 .123 -109 10 8 22.3 11 58 2
1487 = Regulus = alpha Leonis
1487 is triple : 1.3 8.1 175" 308.0 : 1.3 217" 274.0
Table created with Occult3.6 from Dave Herald
| The star occultation of Regulus in Woodquarter at the bottom dark moon limb at 15:23:38 UTC |
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| The end of the star occultation of Regulus in Woodquarter at the bottom bright moon limb at 15:49:42 UTC |
 Diagrams created with Guide 8 from Bill J Gray |
Video and images of Regulus daytime occultation - 2007/05/23
Earthmoon occults Regulus on dark limb - real time video MPEG4 (1.6MB)
Regulus reappearance on bright moon limb - real time video MPEG4 (1.8MB)
Earthmoon moving away from Regulus - time lapse video MPEG4 (1.8MB)
Some additional images from the observation beside our house
Observation image 1
Observation image 2
Observation image 3
Observation image 4
Observation image 5
Observation image 6
Observation image 7
Observation image 8
Result of Regulus occultation 2007/05/23 in shortform
Observer Position Observer
48° 47´ 13.5" North (WGS84) Gerhard Dangl
15° 14´ 08.4" East (WGS84) 3830, Nonndorf 12
594m Height (WGS84) AUSTRIA
Regulus disappearance time: 15:23:39.184 (+/-10ms) UTC - daytime, dark limb
Regulus reappearance time: 15:49:36.520 (+/-10ms) UTC - daytime, bright limb
Occultation duration : 00:25:57.336 (+/-20ms) UTC
The pre-reduction results of my report returned by ILOC:
(International Lunar Occultation Center (ILOC) in Japan)
INTERNATIONAL LUNAR OCCULTATION CENTER (ILOC) PRELIMINARY REDUCTION OF LUNAR OCCULTATION OBSERVATIONS FOR REPORT R1583
TEL CODE 1 LOCATION(E 15 14 8.40 N48 47 13.50 594.0M (DM 84 WGS84 ) TELESCOPE(AP 25CM FL 120CM TYPE NED)
OBS CODE 1 Gerhard Dangl
DATE TIME(UTC) AGE CT STAR NO. MAG PH TEL OBS REC O-C(")HW(") K-R(DEG)KM(DEG) H92 SOURCE SAO DM REPORT DAT.NO.
7 5 23 15 23 39.18 6.8 S 98967 1.4 DD 1 1 1 0.05 -0.84 79.1 194.6 H 15260 P 49669 98967 +12 2149 158300 0001
7 5 23 15 49 36.52 6.8 S 98967 1.4 RB 1 1 1 -0.43 0.54 117.1 232.6 H 15260 P 49669 98967 +12 2149 158300 0002
© 2007 G. Dangl
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