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 Aug 21 - Thu Local Time = 00:07:51 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2460908.50545139 =========================================================================== Geocentric Equatorial Coordinates of Mercury Right Ascension = 08h 48m 20.90s = 8.8058054h = 132.0870810° Declination = +17° 22' 12.14" = +17.370040° True Distance = 0.948714396 AU = 141.925654 Mkm = 88.188513 Mmi Visual Magnitude = -0.4 Angular Diameter = 7.083" Horizontal Parallax = 9.270" = 0.154492' = 0.002574873° Light/Signal Time = 07m 53.41s =========================================================================== 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 = 08h 48m 20.50s = 8.8056940h = 132.0854098° Topocentric Decl = +17° 22' 05.07" = +17.368076° Local Hour Angle = +08h 10m 28.74s = 122.6197544533° (W=Negative) Local Sidereal Time = 16h 58m 49.239s = 16.980344286h = 254.705164290° Azimuth = 125.26544° (Measured clockwise from S=0°) = 305.26544° (Measured clockwise from N=0°) Direction = NW Altitude = -10.08721° (Invisible - Below Local Horizon) =========================================================================== Mercury Ephemeris Table For Each Day Of Aug. 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 2460886 8.7949153 +12.746332 0.588047572 +4.9 xx 2460887 8.7462732 +12.922792 0.589729741 +5.2 xx 2460888 8.6974878 +13.127417 0.592766912 +5.3 xx 2460889 8.6494183 +13.357169 0.597198908 +5.3 1 2460890 8.6029441 +13.608625 0.603057916 +5.2 2 2460891 8.5589457 +13.878053 0.610367745 +4.8 3 2460892 8.5182840 +14.161495 0.619143296 +4.5 4 2460893 8.4817822 +14.454846 0.629390239 +4.0 5 2460894 8.4502085 +14.753934 0.641104865 +3.6 6 2460895 8.4242631 +15.054586 0.654274079 +3.2 7 2460896 8.4045678 +15.352680 0.668875489 +2.8 8 2460897 8.3916594 +15.644184 0.684877538 +2.4 9 2460898 8.3859867 +15.925185 0.702239618 +2.1 10 2460899 8.3879093 +16.191899 0.720912128 +1.7 11 2460900 8.3977002 +16.440677 0.740836447 +1.4 12 2460901 8.4155479 +16.668006 0.761944806 +1.1 13 2460902 8.4415610 +16.870502 0.784160047 +0.9 14 2460903 8.4757719 +17.044913 0.807395310 +0.6 15 2460904 8.5181410 +17.188116 0.831553684 +0.4 16 2460905 8.5685603 +17.297127 0.856527888 +0.2 17 2460906 8.6268569 +17.369119 0.882200085 +0.0 18 2460907 8.6927950 +17.401445 0.908441931 -0.1 19 2460908 8.7660791 +17.391683 0.935114988 -0.3 20 2460909 8.8463558 +17.337681 0.962071614 -0.4 21 2460910 8.9332175 +17.237609 0.989156437 -0.6 22 2460911 9.0262057 +17.090027 1.016208458 -0.7 23 2460912 9.1248163 +16.893934 1.043063795 -0.8 24 2460913 9.2285070 +16.648822 1.069558982 -0.8 25 2460914 9.3367059 +16.354712 1.095534660 -0.9 26 2460915 9.4488219 +16.012171 1.120839434 -1.0 27 2460916 9.5642566 +15.622310 1.145333606 -1.0 28 2460917 9.6824170 +15.186752 1.168892484 -1.1 29 2460918 9.8027276 +14.707586 1.191409021 -1.2 30 2460919 9.9246415 +14.187295 1.212795567 -1.2 31 2460920 10.0476503 +13.628679 1.232984671 -1.3 xx 2460921 10.1712915 +13.034763 1.251928926 -1.3 xx 2460922 10.2951528 +12.408711 1.269599971 -1.4 xx JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day ===========================================================================