```c
#include
cat_entry star;
object source;
observer loc;
novas_timespec time;
novas_frame frame;
sky_pos app;
// IERS Earth Orientation Parameters...
int leap_seconds = 37;
double dt1 = 0.06256; // [s]
double dx = 103.4; // [mas]
double dy = 396.2; // [mas]
// Define ICRS coordinates
make_cat_entry("Antares", "HIP", 80763,
novas_hms_hours("16h 29m 24.45970s"),
novas_dms_degrees("−26d 25m 55.2094s"),
-12.11, -23.30, 5.89, -3.4, &star);
make_cat_object(&star, &source);
// Observer location
make_gps_observer(50.7374, 7.0982, 60.0,
&loc);
// Set time of observation
novas_set_str_time(NOVAS_TAI,
"2025-02-27T19:57:00.728+0200",
leap_seconds, dut1, &time);
// Observer frame
novas_make_frame(NOVAS_FULL_ACCURACY,
&loc, &time, dx, dy, &frame);
// apparent coordinates in system
novas_sky_pos(&source, &frame, NOVAS_CIRS, &app);
```
</td>
|
```c++
#include
using namespace supernovas;
// IERS Earth Orientation Parameters...
EOP eop(37, 62.56 * Unit::ms,
103.4 * Unit::mas, 396.2 * Unit::mas);
// Define ICRS coordinates
auto source = CatalogEntry("Antares",
"16h 29m 24.45970s", "−26d 25m 55.2094s")
.parallax(5.89 * Unit::mas)
.proper_motion(-12.11 * Unit::mas / Unit::yr,
-23.30 * Unit::mas / Unit::yr)
.radial_velocity(-3.4 * Unit::km / Unit::s)
.to_source();
// Observer location
auto obs = Site::from_GPS(50.7374, 7.0982, 60.0)
.to_observer(eop);
// Set time of observation
Time t("2026-03-14T13:43:00.728+0200", eop,
NOVAS_TAI);
// Observer frame
auto frame = obs.frame_at(t);
// apparent coordinates in system
auto app = source.apparent_in(frame).cirs();
```
</td>
</tr>
</table>
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Copyright (C) 2026 Attila Kovács
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