|
|
An 11.13 second occultation was recorded on video by Dave Herald at Kambah, ACT, Australia.
There was no updated prediction for this event. View the original prediction.
Observers: 1 D. Herald, Kambah, ACT, Australia 2(M) J. Blanksby, Wandin, Vic, Australia
Discussion:
The circle above is plotted at the expected 407km diameter of Hygiea.
With only one chord being observed it is not possible to say where the centre of Hygiea's shadow passed. However what can be said is that given Dave's observation, the actual track can not have been too far from the predicted track.
Observational Data:
Observer's Name : Dave Herald
Aperture (cm) : 35cm
Focal length (cm) : 350 cm
Type (e.g. SCT; Newtonian) : SCT
Magnification : -
Observing site name : Kambah
Longitude (East +ve) : +149 03 49.0
Latitude (South -ve) : -35 23 49.3
Height above Sealevel (metres) : 583
Geodetic Datum (e.g.WGS84,NZ1949): WGS84
Height Datum (if known) :
Sky Transparency (Delete two) : Good
Star Image Stability (Delete two): Good
Time Source (e.g. WWV, GPS) :
Recording method (e.g. tape) : Video, onto VCR with internal clock adjusted to correct time
Could you see the Asteroid? : Yes
Approx. Limiting Magnitude :
| Estimated |
Universal Time | Reaction | Accuracy, Remarks
h m s | Time (sec) |
Disappearance At : 18 46 23.70
Reappearance At : 18 46 34.83
ADDITIONAL COMMENTS: (None)
Observer's Name : Jim Blanksby
Aperture (cm) : 15
Focal length (cm) : 75
Type (e.g. SCT; Newtonian) : Newtonian
Magnification : 187
Observing site name :
Longitude (DD MM SS ; East +ve) : +145d 25' 22"
Latitude (DD MM SS ; South -ve) : -37d 46' 53"
Height above Sealevel (metres) : 181
Geodetic Datum (e.g.WGS84,NZ1949): Aust1966
Height Datum (if known) :
Sky Transparency (Delete two) : Good
Star Image Stability (Delete two): Good
Other Conditions:
(Wind, Clouds, Lights, etc.):
TIMINGS: (PLEASE REPORT IN UNIVERSAL TIME)
Time Source (e.g. WWVH, GPS) : 10MHz WWVH
Recording method (e.g. tape) : Tape
Could you see the Asteroid? : Y
Approx. Limiting Magnitude : 13
| Estimated |
Universal Time | Reaction | Accuracy, Remarks
h m s | Time (sec) |
COLUMN FORMAT TO USE---> __:__:__._ _._ _________________)
Started Observing : 18:36:00
Star and Object Merged : 18:35 Approx.
Disappearance At :
Estimated Closest Approach :
(if no D/R)
Reappearance At :
Star and Object Separated : 19:00 Approx.
Stopped Observing : 18:57:00
Was your reaction time (also known as Personal Equation) subtracted from
any of the above timings? : N
If YES, state value :
If you could tell, in which direction did the asteroid pass relative to
the star (Delete three) : NORTH, SOUTH, EAST, or WEST
If possible, estimate the DISTANCE OF CLOSEST APPROACH in arc seconds:
List all Interruptions to Observing:
(FORMAT --> __:__:__._ - __:__:__ _____________________)
FROM TO REASON
Break 1: 18:40:18 - 18:40:57 Equipment
Break 2:
ADDITIONAL COMMENTS: (None)