Object properties (dialog)¶
The “Object properties” dialog is used to display a table or a plot of various object properties as a function of time.
Activating the dialog¶
The dialog can be activated:
- from the main menu: .
The “Plot object properties” dialog appears. Confirm the dialog.
Object properties dialog¶

Object properties
(1) The actual data set is shown here.
(2) You can switch the labels on the X axis between Julian date (JD) or date and time (UTC).
(3) The list of available data sets is displayed here.
(4) The ID of the selected object is shown here. Click the ellipsis button (...) to check the chart or select another object.
Data sets¶
The following data sets are available:
- X - The horizontal position of the object’s center w.r.t. the frame border; in pixels
- Y - The vertical position of the object’s center w.r.t. the frame border; in pixels
- SKY - The mean local background level computed in the “sky annulus”; in ADU
- FWHM - The estimated de-focus of the object expressed as the Full Width at Half Maximum value; average from the two values measured in the horizontal and the vertical direction; in pixels
- MAG - Absolute instrumental brightness of the object; in magnitudes
Statistics¶
The Statistics is a tool that computes and shows the minimum, maximum, sample mean and standard deviation.
To activate the tool:
- From the local menu, select . A new panel on the right side of the preview window appears.
If no points are selected, all points in the data set are included in the computation. To restrict the data for the statistics, press and hold the Shift key and draw a rectangle in a graph while you keep the left mouse button pressed down.
Measurement¶
The Measurement tool displays two cursors in the graph. The cursors can be adjusted by dragging them using the left mouse button. The position of each cursor, their distance and statistics for the data between cursors is presented.
To activate the tool:
From the local menu, select
. A new panel on the right side of the preview window appears.Measurement tool
(1) Choose the axis you want to measure.
(2) Positions of the cursor 1 and 2 are displayed here.
(3) Distance between cursor 1 and 2.
(4) When cursors are defined on the independent (X) axis, number of points (frames) between cursor 1 and 2 are displayed and also minimum, maximum, mean value and sample deviation are presented.