|
A/2025 A7 |
| ephemeris |
date |
magn |
radius |
delta |
ra |
dec |
elong |
phase |
PA |
| Nearest approach | 4 Mar 2025 | 18.5 | 2.894 AU | 1.911 AU | 10h39m | -01°58' | 170.2° | 3.3° | 30° |
| Perihelion | 28 Mar 2025 | 19.2 | 2.884 AU | 2.095 AU | 09h24m | -01°07' | 134.4° | 14.3° | 93° |
| Today | 16 Oct 2025 | 20.9 | 3.519 AU | 3.636 AU | 08h16m | -21°11' | 75.4° | 15.9° | 274° |
A/2025 A7- 2025-10-16
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=14.50; 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 A7 are:
e (Eccentricity) : 0.9993250
q (Perihelion distance) : 2.8835190
i (Inclination) : 133.65380
Ω (Longitude of ascending node) : 348.85220
ω (Argument of perihelion) : 195.57730
L (Longitude of perihelion) : 337.95935
B (Latitude of perihelion) : -11.20347
T (Time of perihelion passage) : 2460762.62110
P (Orbital period in years) : 279208.46
Epoch : 2025 Oct 15
Reference : MPEC 2025-ST8
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
2025-10-15 00:00 UT 08 17 23.3 -20 42 01 3.656 3.508 73.6 15.8 273 20.9
2025-10-16 00:00 UT 08 16 45.0 -20 56 37 3.646 3.513 74.5 15.9 274 20.9
2025-10-16 23:58 UT 08 16 05.3 -21 11 15 3.636 3.519 75.4 15.9 274 20.9
2025-10-17 00:00 UT 08 16 05.3 -21 11 16 3.636 3.519 75.4 15.9 274 20.9
2025-10-18 00:00 UT 08 15 24.1 -21 25 59 3.626 3.524 76.2 15.9 275 20.9
2025-10-19 00:00 UT 08 14 41.3 -21 40 44 3.615 3.530 77.1 16.0 276 20.9
2025-10-20 00:00 UT 08 13 57.0 -21 55 33 3.605 3.535 78.0 16.0 276 20.9
2025-10-21 00:00 UT 08 13 11.1 -22 10 23 3.595 3.541 78.9 16.0 277 20.9
2025-10-22 00:00 UT 08 12 23.6 -22 25 17 3.585 3.546 79.8 16.0 278 20.9
2025-10-23 00:00 UT 08 11 34.4 -22 40 12 3.574 3.552 80.7 16.0 278 20.9
2025-10-24 00:00 UT 08 10 43.6 -22 55 08 3.564 3.558 81.6 16.1 279 20.9
2025-10-25 00:00 UT 08 09 51.1 -23 10 06 3.554 3.563 82.5 16.1 280 20.9
2025-10-26 00:00 UT 08 08 56.9 -23 25 05 3.544 3.569 83.4 16.1 281 20.9
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.
