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 = 2026 May 12 - Tue Local Time = 11:35:09 Standard Time Std. Time Zone Offset = 00:00:00 Applied Delta T = +00:00:00 Astronomical JD TT = 2461172.98274306 =========================================================================== Geocentric Equatorial Coordinates of Mercury Right Ascension = 03h 07m 16.99s = 3.1213857h = 46.8207855° Declination = +17° 18' 45.55" = +17.312653° True Distance = 1.324314156 AU = 198.114578 Mkm = 123.102691 Mmi Visual Magnitude = -2.1 Angular Diameter = 5.074" Horizontal Parallax = 6.641" = 0.110676' = 0.001844592° Light/Signal Time = 11m 00.84s =========================================================================== 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 = 03h 07m 17.32s = 3.1214789h = 46.8221831° Topocentric Decl = +17° 18' 41.53" = +17.311537° Local Hour Angle = +18h 41m 33.52s = 280.38967979651° (W=Negative) Local Sidereal Time = 21h 48m 50.847s = 21.814124196h = 327.211862946° Azimuth = 263.82331° (Measured clockwise from S=0°) = 83.82331° (Measured clockwise from N=0°) Direction = E Altitude = +19.17308° (Above Local Horizon - No refractions applied) =========================================================================== Mercury Ephemeris Table For Each Day Of May 2026 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 2461159 1.3727490 +06.329033 1.222376794 -0.6 xx 2461160 1.4830748 +07.085177 1.233819356 -0.6 xx 2461161 1.5954452 +07.851848 1.244862799 -0.7 xx 2461162 1.7099296 +08.627965 1.255459704 -0.8 1 2461163 1.8265977 +09.412330 1.265557738 -0.9 2 2461164 1.9455172 +10.203602 1.275099521 -0.9 3 2461165 2.0667520 +11.000288 1.284022627 -1.0 4 2461166 2.1903590 +11.800720 1.292259727 -1.1 5 2461167 2.3163858 +12.603039 1.299738951 -1.2 6 2461168 2.4448664 +13.405182 1.306384503 -1.4 7 2461169 2.5758178 +14.204867 1.312117577 -1.5 8 2461170 2.7092357 +14.999591 1.316857634 -1.6 9 2461171 2.8450896 +15.786626 1.320524046 -1.8 10 2461172 2.9833191 +16.563031 1.323038140 -1.9 11 2461173 3.1238291 +17.325679 1.324325582 -2.1 12 2461174 3.2664867 +18.071282 1.324319052 -2.3 13 2461175 3.4111117 +18.796552 1.322961061 +0.0 14 2461176 3.5575178 +19.497781 1.320206741 -2.4 15 2461177 3.7054177 +20.171812 1.316026393 -2.2 16 2461178 3.8545318 +20.815291 1.310407543 -2.1 17 2461179 4.0045334 +21.425121 1.303356303 -1.9 18 2461180 4.1550698 +21.998484 1.294897855 -1.8 19 2461181 4.3057700 +22.532914 1.285075988 -1.6 20 2461182 4.4562536 +23.026353 1.273951715 -1.5 21 2461183 4.6061393 +23.477195 1.261601080 -1.4 22 2461184 4.7550536 +23.884303 1.248112391 -1.3 23 2461185 4.9026378 +24.247008 1.233583101 -1.2 24 2461186 5.0485531 +24.565094 1.218116600 -1.1 25 2461187 5.1924854 +24.838761 1.201819148 -1.0 26 2461188 5.3341473 +25.068583 1.184797114 -1.0 27 2461189 5.4732794 +25.255460 1.167154650 -0.9 28 2461190 5.6096504 +25.400564 1.148991838 -0.8 29 2461191 5.7430555 +25.505289 1.130403329 -0.7 30 2461192 5.8733150 +25.571207 1.111477439 -0.6 31 2461193 6.0002718 +25.600020 1.092295634 -0.6 xx 2461194 6.1237887 +25.593528 1.072932348 -0.5 xx 2461195 6.2437459 +25.553594 1.053455067 -0.4 xx JD12_TT RA_Hr Decl_Deg Dist_AU VMag Day ===========================================================================