(124) Alkeste |
ephemeris |
date |
magn |
radius |
delta |
ra |
dec |
elong |
phase |
Opposition | 14 Jun 2025 | 11.0 | 2.429 AU | 1.416 AU | 17h36m | -18°23' | 175.0° | 2.1° |
Today | 10 Jul 2025 | 11.6 | 2.436 AU | 1.495 AU | 17h15m | -18°14' | 151.3° | 11.6° |
(124) Alkeste - 2025-07-10
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) : 187.90890
ω (Argument of perihelion) : 61.65613
M (Mean anomaly) : 2.89909
Epoch : 2025 May 05
L (Longitude of perihelion) : 249.53298
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
2025-07-10 00:00 UT 17 15 19.0 -18 14 02 1.495 2.436 151.3 11.6 103 11.6
2025-07-10 05:56 UT 17 15 10.3 -18 14 06 1.496 2.436 151.1 11.7 103 11.6
2025-07-11 00:00 UT 17 14 44.4 -18 14 22 1.501 2.436 150.3 11.9 103 11.6
2025-07-12 00:00 UT 17 14 11.2 -18 14 46 1.507 2.436 149.2 12.3 103 11.6
2025-07-13 00:00 UT 17 13 39.7 -18 15 14 1.514 2.437 148.1 12.7 102 11.7
2025-07-14 00:00 UT 17 13 09.7 -18 15 44 1.520 2.437 147.1 13.1 102 11.7
2025-07-15 00:00 UT 17 12 41.3 -18 16 19 1.527 2.437 146.0 13.5 102 11.7
2025-07-16 00:00 UT 17 12 14.5 -18 16 57 1.535 2.438 145.0 13.8 101 11.7
2025-07-17 00:00 UT 17 11 49.3 -18 17 38 1.542 2.438 143.9 14.2 101 11.8
2025-07-18 00:00 UT 17 11 25.8 -18 18 23 1.549 2.438 142.9 14.6 101 11.8
2025-07-19 00:00 UT 17 11 04.0 -18 19 11 1.557 2.439 141.9 14.9 101 11.8
2025-07-20 00:00 UT 17 10 43.9 -18 20 03 1.565 2.439 140.9 15.3 101 11.8
2025-07-21 00:00 UT 17 10 25.4 -18 20 58 1.573 2.439 139.8 15.6 100 11.8
2025-07-22 00:00 UT 17 10 08.8 -18 21 56 1.581 2.440 138.8 15.9 100 11.9
2025-07-23 00:00 UT 17 09 53.8 -18 22 58 1.590 2.440 137.8 16.2 100 11.9
2025-07-24 00:00 UT 17 09 40.6 -18 24 03 1.598 2.440 136.8 16.5 100 11.9
2025-07-25 00:00 UT 17 09 29.2 -18 25 11 1.607 2.441 135.8 16.9 100 11.9
2025-07-26 00:00 UT 17 09 19.6 -18 26 23 1.616 2.441 134.8 17.2 99 12.0
2025-07-27 00:00 UT 17 09 11.7 -18 27 38 1.625 2.441 133.9 17.4 99 12.0
2025-07-28 00:00 UT 17 09 05.6 -18 28 55 1.635 2.442 132.9 17.7 99 12.0
2025-07-29 00:00 UT 17 09 01.3 -18 30 16 1.644 2.442 131.9 18.0 99 12.0
2025-07-30 00:00 UT 17 08 58.8 -18 31 40 1.653 2.443 131.0 18.3 99 12.0
2025-07-31 00:00 UT 17 08 58.0 -18 33 07 1.663 2.443 130.0 18.6 99 12.1
2025-08-01 00:00 UT 17 08 59.0 -18 34 36 1.673 2.443 129.1 18.8 99 12.1
2025-08-02 00:00 UT 17 09 01.8 -18 36 09 1.683 2.444 128.1 19.1 98 12.1
2025-08-03 00:00 UT 17 09 06.3 -18 37 43 1.693 2.444 127.2 19.3 98 12.1
2025-08-04 00:00 UT 17 09 12.6 -18 39 21 1.703 2.444 126.3 19.5 98 12.2
2025-08-05 00:00 UT 17 09 20.6 -18 41 01 1.713 2.445 125.4 19.8 98 12.2
2025-08-06 00:00 UT 17 09 30.3 -18 42 43 1.724 2.445 124.5 20.0 98 12.2
2025-08-07 00:00 UT 17 09 41.8 -18 44 27 1.734 2.446 123.6 20.2 98 12.2
2025-08-08 00:00 UT 17 09 54.9 -18 46 14 1.745 2.446 122.7 20.4 98 12.2
2025-08-09 00:00 UT 17 10 09.7 -18 48 03 1.756 2.446 121.8 20.6 97 12.3
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.