The Sky Over SETI Net
Mouse over the three letter constellation abbreviation and a click will take you directly to the archives. Remember to refresh your browser for the current position of the antenna. Questions - Comments: Email me!
- White Curve - The local horizon
- Blue Band - The Milky Way
- White Spike - Antenna Stop
- Constellations - 3 letter abbreviation
- '+' - The Current Target location
- 'O' - The Current Antenna location
- L4/L5 - Lagrange points. You cannot click on these
- 22h - Hours of Right Ascension (0 to 23)
- +30 - Degrees of Declination (-90 to +90)
- Mercator Projection - Type of map
Local Horizon:This curve represents the horizon at SETI Net. Everything above the line is visible to the station. Targets below the line cannot be pointed at.
During the day (and the night) this curve moves across the display, from right to left, showing which targets are viewable. Its shape and position are calculated by the station and displayed here in real time during operation.
To see why it is curved follow "Mercator Projection" below..
Make sure to see the latest position by refreshing your browser
The Milky WayThis Milky Way is our home. It contains roughly 300,000,000,000 stars. Current estimates of planets around those stars is about 1,500,000,000,000 and about ten percent of these in the "Goldly Locks Zone".
Antenna StopThe Azimuth rotor has a mechanical stop that shuts down the motor when reached from either direction.
The width of the stop shows up as a large vertical spike that moves along with the local horizon curve.
There are 89 constellations used by SETI Net. You can see the complete list here:
Current TargetThe white "+" sign is the current location being searched.
It is rather hard to find and will be on top of the "O" sign of the antenna when the system is tracking.
Antenna LocationThe white "O" sign is the current antenna location. It's diameter represents the Half Power Beam Width (HPBW). HPBW is calculated from the antenna size and the current receiving frequency. Normally its about 3.5 degrees.
The size of the "O" changes depending on position on the map. The HPBW stays the same but the Mercator Projection distorts the symbol.
When the antenna is locked and tracking a target the 'O' and the 'X' over lay each other and produce a bulls eye.
Lagrange Points L4 and L5
The Lagrange points are a special search area watched closley by SETI Net.
The two symbols do not follow the local horizon line because there locations are calculated from the position of the Sun.
You may click here to learn more about these two facinating points.
Right Ascension (hours)
Hours of right ascension are *nearly* the same as the normal 24 hours in a day they are, however, sidereal hours.
The white boxes in the center of the map go from zero (far right) to 23 (far left) for a total of 24 hours.
Degrees of declination correspond to the up/down movement of the antenna.
DEC goes from -90 to +90 degrees as marked by the white boxes in the center of the map.