(7) Iris |
ephemeris |
date |
magn |
radius |
delta |
ra |
dec |
elong |
phase |
Today | 2 Oct 2025 | 10.4 | 2.110 AU | 2.601 AU | 09h19m | +12°45' | 50.5° | 21.5° |
Opposition | 27 Feb 2026 | 8.9 | 2.491 AU | 1.508 AU | 10h28m | -00°04' | 171.0° | 3.6° |
(7) Iris - 2025-10-02
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 Iris are:
e (Eccentricity) : 0.2302133
a (Semimajor axis) : 2.3865290
i (Inclination) : 5.51881
Ω (Longitude of ascending node) : 259.49459
ω (Argument of perihelion) : 145.48204
M (Mean anomaly) : 61.72502
Epoch : 2025 Nov 21
L (Longitude of perihelion) : 225.10082
B (Latitude of perihelion) : 3.12403
P (Orbital period in years) : 3.69
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
2025-10-02 00:00 UT 09 19 31.3 +12 45 17 2.601 2.110 50.5 21.5 285 10.4
2025-10-02 21:41 UT 09 21 07.8 +12 35 58 2.595 2.112 50.9 21.6 286 10.4
2025-10-03 00:00 UT 09 21 18.1 +12 34 58 2.594 2.112 51.0 21.6 286 10.4
2025-10-04 00:00 UT 09 23 04.3 +12 24 39 2.587 2.115 51.5 21.7 286 10.4
2025-10-05 00:00 UT 09 24 49.8 +12 14 18 2.581 2.117 52.0 21.9 286 10.4
2025-10-06 00:00 UT 09 26 34.7 +12 03 55 2.574 2.120 52.5 22.0 286 10.4
2025-10-07 00:00 UT 09 28 18.8 +11 53 32 2.567 2.122 53.1 22.1 286 10.4
2025-10-08 00:00 UT 09 30 02.3 +11 43 07 2.560 2.125 53.6 22.2 286 10.4
2025-10-09 00:00 UT 09 31 45.1 +11 32 42 2.553 2.127 54.1 22.4 286 10.4
2025-10-10 00:00 UT 09 33 27.3 +11 22 16 2.545 2.130 54.7 22.5 287 10.4
2025-10-11 00:00 UT 09 35 08.7 +11 11 48 2.538 2.132 55.2 22.6 287 10.4
2025-10-12 00:00 UT 09 36 49.5 +11 01 21 2.531 2.135 55.8 22.7 287 10.4
2025-10-13 00:00 UT 09 38 29.5 +10 50 52 2.523 2.138 56.3 22.9 287 10.4
2025-10-14 00:00 UT 09 40 08.9 +10 40 23 2.516 2.140 56.8 23.0 287 10.4
2025-10-15 00:00 UT 09 41 47.5 +10 29 54 2.508 2.143 57.4 23.1 287 10.4
2025-10-16 00:00 UT 09 43 25.5 +10 19 25 2.501 2.145 57.9 23.2 287 10.4
2025-10-17 00:00 UT 09 45 02.7 +10 08 55 2.493 2.148 58.5 23.3 287 10.4
2025-10-18 00:00 UT 09 46 39.2 +09 58 25 2.485 2.150 59.1 23.4 287 10.4
2025-10-19 00:00 UT 09 48 14.9 +09 47 56 2.478 2.153 59.6 23.5 288 10.4
2025-10-20 00:00 UT 09 49 49.9 +09 37 26 2.470 2.156 60.2 23.6 288 10.4
2025-10-21 00:00 UT 09 51 24.2 +09 26 57 2.462 2.158 60.8 23.7 288 10.4
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.