(385) Ilmatar |
ephemeris |
date |
magn |
radius |
delta |
ra |
dec |
elong |
phase |
Today | 20 May 2025 | 13.2 | 2.977 AU | 2.523 AU | 21h12m | -29°34' | 106.8° | 19.0° |
Opposition | 27 Jul 2025 | 12.2 | 3.051 AU | 2.054 AU | 20h44m | -31°45' | 166.8° | 4.4° |
(385) Ilmatar - 2025-05-20
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 Ilmatar are:
e (Eccentricity) : 0.1267750
a (Semimajor axis) : 2.8479324
i (Inclination) : 13.58033
Ω (Longitude of ascending node) : 344.83949
ω (Argument of perihelion) : 189.11999
M (Mean anomaly) : 101.10312
Epoch : 2025 May 05
L (Longitude of perihelion) : 353.70861
B (Latitude of perihelion) : -2.13291
P (Orbital period in years) : 4.81
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
2025-05-20 00:00 UT 21 12 39.8 -29 34 33 2.523 2.977 106.8 19.0 256 13.2
2025-05-20 20:15 UT 21 13 00.6 -29 34 55 2.513 2.978 107.5 18.9 256 13.2
2025-05-21 00:00 UT 21 13 04.3 -29 35 00 2.511 2.978 107.6 18.9 256 13.2
2025-05-22 00:00 UT 21 13 27.4 -29 35 33 2.499 2.979 108.5 18.8 257 13.1
2025-05-23 00:00 UT 21 13 49.1 -29 36 11 2.488 2.981 109.4 18.7 257 13.1
2025-05-24 00:00 UT 21 14 09.3 -29 36 54 2.476 2.982 110.2 18.6 257 13.1
2025-05-25 00:00 UT 21 14 28.1 -29 37 42 2.465 2.983 111.1 18.5 257 13.1
2025-05-26 00:00 UT 21 14 45.5 -29 38 35 2.453 2.984 112.0 18.3 258 13.1
2025-05-27 00:00 UT 21 15 01.3 -29 39 33 2.442 2.985 112.9 18.2 258 13.1
2025-05-28 00:00 UT 21 15 15.7 -29 40 37 2.431 2.986 113.7 18.1 258 13.1
2025-05-29 00:00 UT 21 15 28.6 -29 41 45 2.419 2.987 114.6 18.0 258 13.0
2025-05-30 00:00 UT 21 15 40.0 -29 42 59 2.408 2.989 115.5 17.8 258 13.0
2025-05-31 00:00 UT 21 15 49.9 -29 44 17 2.397 2.990 116.4 17.7 259 13.0
2025-06-01 00:00 UT 21 15 58.2 -29 45 41 2.387 2.991 117.3 17.5 259 13.0
2025-06-02 00:00 UT 21 16 05.1 -29 47 09 2.376 2.992 118.2 17.4 259 13.0
2025-06-03 00:00 UT 21 16 10.4 -29 48 41 2.365 2.993 119.1 17.2 260 13.0
2025-06-04 00:00 UT 21 16 14.1 -29 50 19 2.355 2.994 120.0 17.1 260 13.0
2025-06-05 00:00 UT 21 16 16.3 -29 52 01 2.344 2.995 121.0 16.9 260 13.0
2025-06-06 00:00 UT 21 16 17.0 -29 53 47 2.334 2.996 121.9 16.7 261 12.9
2025-06-07 00:00 UT 21 16 16.0 -29 55 38 2.324 2.998 122.8 16.5 261 12.9
2025-06-08 00:00 UT 21 16 13.5 -29 57 32 2.314 2.999 123.8 16.3 261 12.9
2025-06-09 00:00 UT 21 16 09.5 -29 59 31 2.304 3.000 124.7 16.2 262 12.9
2025-06-10 00:00 UT 21 16 03.8 -30 01 34 2.294 3.001 125.6 16.0 262 12.9
2025-06-11 00:00 UT 21 15 56.5 -30 03 41 2.284 3.002 126.6 15.8 262 12.9
2025-06-12 00:00 UT 21 15 47.7 -30 05 51 2.275 3.003 127.5 15.6 263 12.8
2025-06-13 00:00 UT 21 15 37.3 -30 08 05 2.265 3.004 128.5 15.3 263 12.8
2025-06-14 00:00 UT 21 15 25.2 -30 10 22 2.256 3.005 129.4 15.1 264 12.8
2025-06-15 00:00 UT 21 15 11.6 -30 12 43 2.247 3.006 130.4 14.9 264 12.8
2025-06-16 00:00 UT 21 14 56.4 -30 15 07 2.238 3.008 131.4 14.7 264 12.8
2025-06-17 00:00 UT 21 14 39.5 -30 17 33 2.229 3.009 132.3 14.5 265 12.8
2025-06-18 00:00 UT 21 14 21.0 -30 20 03 2.221 3.010 133.3 14.2 265 12.8
2025-06-19 00:00 UT 21 14 01.0 -30 22 35 2.212 3.011 134.3 14.0 266 12.7
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.