Mercury Ephemeris Calculator
Based on the NASA/JPL DE405 Ephemeris Model
PHP Program By Jay Tanner
Date: (1600 to 2200) Y m d
Local Time (00h to 24h) H:M:S
Local Time Zone Offset ±H:M
Undefined1
Std. Time = UT
Apply ΔT
+00:00:00
Daylight / Summer Time
Undefined3
Longitude ±Deg.d M S
(Neg=W)
Latitude ±Deg.d M S
(Neg=S)
Sea Level Elevation
(± meters)
This program uses a cookie to store and remember the interface settings between calls.
Mercury Ephemeris Statistics Referred to True Ecliptic and Equinox of Date Based on the NASA/JPL DE405 Ephemeris Model Local Date = 2025 Sep 16 - Tue Local Time = 04:11:15 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2460934.67447917 =========================================================================== Geocentric Equatorial Coordinates of Mercury Right Ascension = 11h 47m 21.93s = 11.7894248h = 176.8413720° Declination = +02° 55' 25.95" = +2.923874° True Distance = 1.391402164 AU = 208.150801 Mkm = 129.338911 Mmi Visual Magnitude = -1.6 Angular Diameter = 4.830" Horizontal Parallax = 6.320" = 0.105339' = 0.001755653° Light/Signal Time = 11m 34.32s =========================================================================== Local Topocentric Coordinates of Mercury For Geographic Location: Longitude = -76.833611111° = -05h 07m 20.1s (W=Negative) Latitude = +42.752194444° Elevation = 0 m Topocentric RA = 11h 47m 21.85s = 11.7894018h = 176.8410267° Topocentric Decl = +02° 55' 21.45" = +2.922626° Local Hour Angle = +10h 58m 01.78s = 164.50741999472° (W=Negative) Local Sidereal Time = 22h 45m 23.627s = 22.756563111h = 341.348446658° Azimuth = 158.88362° (Measured clockwise from S=0°) = 338.88362° (Measured clockwise from N=0°) Direction = NNW Altitude = -42.22810° (Invisible - Below Local Horizon) =========================================================================== Mercury Ephemeris Table For Each Day Of Sep. 2025 at 12:00 TT There are three extra (xx) padding days at each end of the table. JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day 2460917 9.6824170 +15.186752 1.168892484 -1.1 xx 2460918 9.8027276 +14.707586 1.191409021 -1.2 xx 2460919 9.9246415 +14.187295 1.212795567 -1.2 xx 2460920 10.0476503 +13.628679 1.232984671 -1.3 1 2460921 10.1712915 +13.034763 1.251928926 -1.3 2 2460922 10.2951528 +12.408711 1.269599971 -1.4 3 2460923 10.4188755 +11.753742 1.285986821 -1.4 4 2460924 10.5421536 +11.073061 1.301093731 -1.5 5 2460925 10.6647331 +10.369790 1.314937802 -1.5 6 2460926 10.7864086 +09.646927 1.327546514 -1.6 7 2460927 10.9070192 +08.907310 1.338955338 -1.6 8 2460928 11.0264436 +08.153591 1.349205534 -1.7 9 2460929 11.1445954 +07.388233 1.358342219 -1.7 10 2460930 11.2614178 +06.613499 1.366412714 -1.8 11 2460931 11.3768789 +05.831462 1.373465195 -1.8 12 2460932 11.4909671 +05.044000 1.379547622 -1.8 13 2460933 11.6036869 +04.252820 1.384706915 -1.8 14 2460934 11.7150563 +03.459478 1.388988338 -1.7 15 2460935 11.8251052 +02.665372 1.392435063 -1.6 16 2460936 11.9338713 +01.871756 1.395087877 -1.5 17 2460937 12.0413989 +01.079759 1.396985003 -1.4 18 2460938 12.1477368 +00.290400 1.398162010 -1.3 19 2460939 12.2529372 -00.495405 1.398651794 -1.2 20 2460940 12.3570544 -01.276826 1.398484609 -1.1 21 2460941 12.4601435 -02.053112 1.397688132 -1.0 22 2460942 12.5622599 -02.823582 1.396287554 -0.9 23 2460943 12.6634585 -03.587611 1.394305691 -0.9 24 2460944 12.7637927 -04.344630 1.391763098 -0.8 25 2460945 12.8633148 -05.094110 1.388678196 -0.7 26 2460946 12.9620750 -05.835562 1.385067394 -0.7 27 2460947 13.0601209 -06.568530 1.380945216 -0.6 28 2460948 13.1574983 -07.292583 1.376324424 -0.6 29 2460949 13.2542496 -08.007314 1.371216139 -0.5 30 2460950 13.3504149 -08.712333 1.365629953 -0.5 xx 2460951 13.4460308 -09.407266 1.359574042 -0.4 xx 2460952 13.5411312 -10.091749 1.353055262 -0.4 xx JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day ===========================================================================