(124) Alkeste |
ephemeris |
date |
magn |
radius |
delta |
ra |
dec |
elong |
phase |
Today | 29 May 2025 | 11.4 | 2.426 AU | 1.452 AU | 17h50m | -18°43' | 159.3° | 8.5° |
Opposition | 14 Jun 2025 | 11.0 | 2.429 AU | 1.416 AU | 17h36m | -18°23' | 175.0° | 2.1° |
(124) Alkeste - 2025-05-29
astro.vanbuitenen.nl
The interactive orbit chart above shows the body's path through the solar system and its position at the given date.
Green and blue lines are shown perpendicular to the ecliptic plane: Green if the path is above the ecliptic plane, blue if it is below.
(Left-click and drag to rotate the view; Right-click and drag to move the view; Use scroll wheel to zoom in our out.)
The orbital elements of Alkeste are:
e (Eccentricity) : 0.0783889
a (Semimajor axis) : 2.6299281
i (Inclination) : 2.96344
Ω (Longitude of ascending node) : 187.90891
ω (Argument of perihelion) : 61.65611
M (Mean anomaly) : 2.89910
Epoch : 2025 May 05
L (Longitude of perihelion) : 249.53297
B (Latitude of perihelion) : 2.60790
P (Orbital period in years) : 4.26
The light curve chart below shows the estimated development of the minor planet's magnitude.
The all-sky chart below shows the path of the minor planet over the same period as the light curve. The current position is marked yellow.
The following chart shows the path of the minor planet in the next few days. The field of view is optimized for (~10x50) binoculars and finderscopes.
A more printer-friendly version of the same chart can be found below.
Ephemerides:
Date Time RA (2000) DEC (2000) delta radius elong phase PA magn
2025-05-29 00:00 UT 17 50 32.0 -18 43 17 1.452 2.426 159.3 8.5 258 11.4
2025-05-29 00:46 UT 17 50 30.6 -18 43 14 1.452 2.426 159.3 8.5 258 11.4
2025-05-30 00:00 UT 17 49 46.0 -18 41 50 1.448 2.427 160.4 8.1 258 11.4
2025-05-31 00:00 UT 17 48 58.8 -18 40 25 1.444 2.427 161.5 7.6 257 11.3
2025-06-01 00:00 UT 17 48 10.6 -18 39 02 1.440 2.427 162.6 7.2 256 11.3
2025-06-02 00:00 UT 17 47 21.4 -18 37 40 1.437 2.427 163.7 6.7 255 11.3
2025-06-03 00:00 UT 17 46 31.3 -18 36 20 1.434 2.427 164.8 6.3 253 11.3
2025-06-04 00:00 UT 17 45 40.3 -18 35 02 1.431 2.427 165.9 5.9 252 11.2
2025-06-05 00:00 UT 17 44 48.5 -18 33 45 1.428 2.427 167.0 5.4 250 11.2
2025-06-06 00:00 UT 17 43 56.0 -18 32 31 1.426 2.428 168.0 5.0 248 11.2
2025-06-07 00:00 UT 17 43 02.9 -18 31 18 1.424 2.428 169.1 4.5 246 11.2
2025-06-08 00:00 UT 17 42 09.1 -18 30 07 1.422 2.428 170.1 4.1 243 11.1
2025-06-09 00:00 UT 17 41 14.8 -18 28 57 1.420 2.428 171.1 3.7 239 11.1
2025-06-10 00:00 UT 17 40 20.1 -18 27 50 1.419 2.428 172.0 3.3 234 11.1
2025-06-11 00:00 UT 17 39 24.9 -18 26 45 1.418 2.429 172.9 3.0 228 11.1
2025-06-12 00:00 UT 17 38 29.5 -18 25 42 1.417 2.429 173.7 2.6 221 11.0
2025-06-13 00:00 UT 17 37 33.8 -18 24 41 1.416 2.429 174.4 2.4 212 11.0
2025-06-14 00:00 UT 17 36 37.9 -18 23 42 1.416 2.429 174.8 2.2 200 11.0
2025-06-15 00:00 UT 17 35 42.0 -18 22 45 1.416 2.429 175.0 2.1 187 11.0
2025-06-16 00:00 UT 17 34 46.0 -18 21 50 1.416 2.430 175.0 2.1 174 11.0
2025-06-17 00:00 UT 17 33 50.1 -18 20 58 1.416 2.430 174.7 2.2 161 11.0
2025-06-18 00:00 UT 17 32 54.2 -18 20 08 1.417 2.430 174.1 2.4 150 11.0
2025-06-19 00:00 UT 17 31 58.6 -18 19 21 1.418 2.430 173.4 2.7 142 11.0
2025-06-20 00:00 UT 17 31 03.2 -18 18 36 1.419 2.430 172.6 3.1 135 11.1
2025-06-21 00:00 UT 17 30 08.2 -18 17 54 1.421 2.431 171.7 3.5 129 11.1
2025-06-22 00:00 UT 17 29 13.6 -18 17 14 1.422 2.431 170.7 3.9 125 11.1
2025-06-23 00:00 UT 17 28 19.5 -18 16 38 1.424 2.431 169.7 4.3 122 11.1
2025-06-24 00:00 UT 17 27 25.9 -18 16 04 1.427 2.431 168.7 4.7 119 11.2
2025-06-25 00:00 UT 17 26 33.0 -18 15 32 1.429 2.432 167.7 5.1 117 11.2
2025-06-26 00:00 UT 17 25 40.8 -18 15 04 1.432 2.432 166.6 5.6 115 11.2
2025-06-27 00:00 UT 17 24 49.3 -18 14 39 1.435 2.432 165.5 6.0 113 11.3
2025-06-28 00:00 UT 17 23 58.8 -18 14 17 1.438 2.432 164.4 6.4 112 11.3
Terminology:
delta: distance between minor planet and earth in AU
radius: distance between minor planet and sun in AU
magn: magnitude (brightness) estimate
ra: right ascension in hours (24h = 360deg)
dec: declination in degrees
elong: elongation in degrees (angle sun-earth-minor planet)
phase: phase angle in degrees (angle sun-minor planet-earth)
AU: Astronomical Unit (mean distance between earth and sun: 149597870.7 km
Orbital elements provided by the MPC (Minor Planet Center).
Calculations by a modified version of AAPlus, a C# implementation of the AA+ project by PJ Naughter from the algorithms presented in the book "Astronomical Algorithms" by Jean Meeus.
NGC2000 dso catalog and star labels from VizieR as provided by the Strasbourg astronomical Data Center.
Tycho2 catalog from the ESO archive.