2014 EZ51 01/06/2019


Observation tips:

- Observations are requested from 05:25 to 05:40 Universal Time.
- Shadow moves from **East to West**;
- The nominal occultation time on the map, corresponds to the big dot, the closest approach.
- Each dot is separated by one minute;
- Dark grey is night and light grey is astronomical twilight (Sun at less than 18 deg below the horizon);
- *Absolute time accuracy is essential** (see important note below);

After the observation, please fill the form available on this link (form), and send it to ribas(at)on.br.

Event information: 

Star J2000 coordinates:
RA 15 44 36.7008 
DEC -25 34 42.818
Day coordinates of the object:
RA 15 45 46.9845 
DEC  -25 38 16.727

Star G mag 16.8
Star R mag 16.1
Star K mag 14.6
Magnitude drop in R 4.4
Maximum duration 31 sec
Moon | 6% illum. @ 160 deg

Important note:

*Absolute time accuracy is essential*

To connect all the observations together after the fact. Check the time of your computer with many sources (phone talked hour, different internet sites, ideally with a GPS). Its advised to check the registered time right after and right before the integrations, so if there is a drift, we can correct it by having the difference.Beware of the dead time between the images: if you manage an exposure time of 1 second (for example), but your camera takes 2 sec to read the image, then there is a 67% chance that you miss the dis(re)-appearance of the star [chance of missing = 1 - {1/(1+2)}]. So it's better to have, for example, a 4 sec integration, so you have 67% chance to get the occultation in one of your exposures [chance of getting = 4/(4+2)].

Finding charts from DSS:

05 x 05 arcmin FOV (North is up, East is left)




Link to Lucky Star Prediction

Click for a Open Street Interactive Map