activities past activities mailing list contact us celestial events links

Almanac - Daily ephemerids

Enter UTC Date:
Enter Location (default is Israel)
E. Longitude o    N. Latitude o    E. Time Zone hours
Help (how to use)   |   Celestial events   |   Sky maps   |   Meteors   |   Clocks   |   Lunar occultations
Date: 17-12-2017
Day in year: 351
Julian Day: 2458104.417 (at local midnight)
Local Sidereal Time at local midnight: 06:02:56

Sun   Sun   (at noon)
R.A. 17:41.1        Dec. -23:22       
Distance 0.984 au
Apparent solar long. 265.66°
Equation of Time: 3.8 min
Morning Evening
Rise/Set 06:34 16:38
Civil Twillight 06:07 17:05
Nautical Twillight 05:37 17:36
Astronomical Twillight 05:07 18:06
Illuminated fraction: -0.02 at local midnight
R.A. -7.37 hours     Dec. -17°     Dist 405 x103km.
Rise: 05:32       Set: 16:17

Albedo Topographic
Moon Phase

The planets

Equinox: J2000.0 date        Geocentric positions for 00 TDT time
Planet R.A. Dec. Delta Elong Mag Phase Diameter Const Rise Set Transit Additional
J2000.0date [au] [au] [deg] [mag] [frac] [arcsec] [HH:MM] [HH:MM] [HH:MM] Information
Mercury 17:00:20.417:01:21.9-20:04:40-20:06:020.7010.314-
Venus 17:13:56.217:14:59.0-22:53:36-22:54:381.6990.726-5.6-3.91.0010Oph06:1016:1411:12
Mars 14:10:27.314:11:23.7-12:06:23-12:11:132.0831.642-
Jupiter 14:47:25.114:48:22.9-15:03:14-15:07:296.1395.434-41.0-1.71.0032Lib03:2114:0708:44 Central meridian
Satellites curves
Satellites midnight
Saturn 17:57:19.017:58:21.8-22:31:24-22:31:2011.04510.0644.51.31.0015Sgr06:5116:5511:53 Saturn rings
Satellites midnight
Uranus 01:31:23.501:32:20.1+08:55:57+09:01:2519.40219.904119.55.71.004Psc13:0101:5019:26
Neptune 22:52:44.122:53:39.2-08:08:27-08:02:4730.16129.94576.47.91.002Aqr11:0622:2916:47

Sky maps

for 20:00 local time
for 22:00 local time
for 00:00 local time
for 02:00 local time
for 04:00 local time

Active Meteor showers: 3

Help & how to use this page

Important comment: The data in this page (unless otherwise noted) is calculated for midnight of date. If for example, you are interested in data for the night of 2008 August 17/18, insert the date "18 08 2008". Note however, that in this example, the Moon/Sun rise/set will be calculated for the day of 2008 August 18!
Accuracy: The sky maps are plotted for the nearest whole
local sidereal hour.
The rise/set times are accurate to about two minutes and are given relative to the local horizon. Note, that the actual rise/set times depends on the atmospheric conditions.