|
A/2025 A1 |
| ephemeris |
date |
magn |
radius |
delta |
ra |
dec |
elong |
phase |
PA |
| Today | 31 Aug 2026 | 19.3 | 5.529 AU | 6.439 AU | 10h22m | +31°52' | 23.7° | 4.2° | 350° |
| Nearest approach | 5 Mar 2027 | 18.6 | 5.336 AU | 4.510 AU | 12h13m | +39°26' | 143.1° | 6.4° | 210° |
| Perihelion | 15 Mar 2027 | 18.6 | 5.336 AU | 4.520 AU | 12h10m | +40°02' | 141.6° | 6.6° | 193° |
A/2025 A1- 2026-08-31
astro.vanbuitenen.nl
The interactive orbit chart above shows the comet'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.)
Light curve
The light curve chart below shows the estimated development of the comet's magnitude. Blue and black dots are visual and photometric CCD observations from COBS.
The displayed light curve is calculated under the assumption that the object remains inactive. (H=11.20; G=.15).
Charts
The all-sky chart below shows the path of the comet over the same period as the light curve. The comet's current position is marked yellow.
The following chart shows the short-term path of the comet in a field of view that is optimized for (~10x50) binoculars and finderscopes.
Orbital elements
The orbital elements of A/2025 A1 are:
e (Eccentricity) : 0.9991890
q (Perihelion distance) : 5.3355320
i (Inclination) : 33.39850
Ω (Longitude of ascending node) : 101.29920
ω (Argument of perihelion) : 68.37780
L (Longitude of perihelion) : 165.90175
B (Latitude of perihelion) : 30.77881
T (Time of perihelion passage) : 2461479.79570
P (Orbital period in years) : 533623.95
Epoch : 2026 Aug 27
Reference : MPEC 2026-M30
Classification(s): : Nearly isotropic; Returning (a < 10000 AU); External (P > 200 years)
Ephemerides
Date Time RA (2000) DEC (2000) delta radius elong phase PA magn
2026-08-30 00:00 UT 10 20 09.3 +31 57 17 6.449 5.533 22.9 4.1 352 19.3
2026-08-31 00:00 UT 10 21 14.7 +31 54 30 6.444 5.531 23.3 4.1 351 19.3
2026-08-31 21:39 UT 10 22 13.7 +31 52 01 6.439 5.529 23.7 4.2 350 19.3
2026-09-01 00:00 UT 10 22 20.1 +31 51 45 6.438 5.529 23.7 4.2 349 19.3
2026-09-02 00:00 UT 10 23 25.5 +31 49 00 6.433 5.527 24.1 4.3 348 19.3
2026-09-03 00:00 UT 10 24 30.8 +31 46 18 6.427 5.525 24.6 4.4 347 19.3
2026-09-04 00:00 UT 10 25 36.2 +31 43 36 6.421 5.523 25.0 4.4 345 19.3
2026-09-05 00:00 UT 10 26 41.6 +31 40 56 6.415 5.521 25.5 4.5 344 19.3
2026-09-06 00:00 UT 10 27 46.9 +31 38 17 6.408 5.519 25.9 4.6 343 19.3
2026-09-07 00:00 UT 10 28 52.2 +31 35 40 6.402 5.517 26.4 4.7 342 19.3
2026-09-08 00:00 UT 10 29 57.5 +31 33 04 6.395 5.516 26.9 4.7 341 19.3
2026-09-09 00:00 UT 10 31 02.7 +31 30 30 6.389 5.514 27.4 4.8 339 19.3
2026-09-10 00:00 UT 10 32 08.0 +31 27 58 6.382 5.512 27.9 4.9 338 19.3
Terminology:
delta: distance between comet and earth in AU
radius: distance between comet 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-comet)
phase: phase angle in degrees (angle sun-comet-earth)
AU: Astronomical Unit (mean distance between earth and sun: 149597870.7 km
Orbital elements usually provided by the MPC (Minor Planet Center).
Observations contributed by observers worldwide, via COBS (Comet Observation Database) or 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.
