|
C/2018 N2 (ASASSN) |
| ephemeris |
date |
magn |
radius |
delta |
ra |
dec |
elong |
phase |
PA |
| Nearest approach | 19 Oct 2019 | 11.7 | 3.145 AU | 2.229 AU | 01h08m | +36°48' | 152.4° | 8.4° | 167° |
| Perihelion | 12 Nov 2019 | 11.8 | 3.137 AU | 2.340 AU | 00h14m | +39°10' | 136.9° | 12.4° | 108° |
| Today | 17 Oct 2025 | 22.5 | 15.899 AU | 16.790 AU | 13h47m | +16°08' | 25.8° | 1.6° | 11° |
C/2018 N2 (ASASSN)- 2025-10-17
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.
This lightcurve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 5.4 + 5 log[∆] + 9.1 log[r]). An additional green curve is displayed when an increase in apparent brightness is expected due to forward scattering of sunlight, which occurs when a dust-rich comet is located between the Earth and the Sun. (See Marcus 2007)
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 C/2018 N2 (ASASSN) are:
e (Eccentricity) : 1.0020820
q (Perihelion distance) : 3.1366090
i (Inclination) : 77.47520
Ω (Longitude of ascending node) : 24.53860
ω (Argument of perihelion) : 25.33510
L (Longitude of perihelion) : 30.40078
B (Latitude of perihelion) : 24.69125
T (Time of perihelion passage) : 2458799.60480
Epoch : 2025 Oct 15
Reference : MPEC 2022-YN2
Classification(s): : Nearly isotropic; New (a > 10000 AU)
Ephemerides
Date Time RA (2000) DEC (2000) delta radius elong phase PA magn
2025-10-16 00:00 UT 13 46 47.9 +16 10 51 16.785 15.892 25.6 1.6 14 22.5
2025-10-17 00:00 UT 13 47 01.3 +16 09 05 16.789 15.898 25.8 1.6 11 22.5
2025-10-17 04:22 UT 13 47 03.7 +16 08 46 16.790 15.899 25.8 1.6 11 22.5
2025-10-18 00:00 UT 13 47 14.7 +16 07 20 16.793 15.903 25.9 1.6 9 22.5
2025-10-19 00:00 UT 13 47 28.1 +16 05 37 16.796 15.909 26.2 1.6 7 22.5
2025-10-20 00:00 UT 13 47 41.5 +16 03 56 16.799 15.914 26.4 1.6 5 22.5
2025-10-21 00:00 UT 13 47 54.9 +16 02 16 16.802 15.919 26.7 1.6 3 22.5
2025-10-22 00:00 UT 13 48 08.3 +16 00 38 16.805 15.925 27.0 1.6 1 22.5
2025-10-23 00:00 UT 13 48 21.7 +15 59 02 16.808 15.930 27.3 1.6 359 22.5
2025-10-24 00:00 UT 13 48 35.0 +15 57 27 16.810 15.936 27.6 1.7 357 22.5
2025-10-25 00:00 UT 13 48 48.4 +15 55 54 16.812 15.941 28.0 1.7 356 22.5
2025-10-26 00:00 UT 13 49 01.8 +15 54 23 16.814 15.947 28.4 1.7 354 22.5
2025-10-27 00:00 UT 13 49 15.1 +15 52 53 16.816 15.952 28.8 1.7 352 22.5
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.
