C/2018 Y1 (Iwamoto) |
ephemeris |
date |
magn |
radius |
delta |
ra |
dec |
elong |
phase |
PA |
Perihelion | 4 Feb 2019 | 7.3 | 1.288 AU | 0.416 AU | 12h18m | -04°22' | 129.0° | 36.5° | 295° |
Nearest approach | 11 Feb 2019 | 6.6 | 1.293 AU | 0.308 AU | 09h59m | +19°20' | 172.7° | 5.6° | 225° |
Today | 26 Jul 2024 | 32.3 | 16.026 AU | 15.488 AU | 23h53m | +11°28' | 120.4° | 3.1° | 239° |
C/2018 Y1 (Iwamoto)- 2024-07-26
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.)
The orbital elements of C/2018 Y1 (Iwamoto) are:
e (Eccentricity) : 0.9898350
q (Perihelion distance) : 1.2883320
i (Inclination) : 160.45290
Ω (Longitude of ascending node) : 147.39440
ω (Argument of perihelion) : 357.86310
L (Longitude of perihelion) : 149.40825
B (Latitude of perihelion) : -0.71482
T (Time of perihelion passage) : 2458518.79700
P (Orbital period in years) : 1426.86
Epoch : 2024 Jul 25
Reference : MPEC 2024-A43
Classification(s): : Nearly isotropic; Returning (a < 10000 AU); External (P > 200 years)
The light curve chart below shows the estimated development of the comet's magnitude. Blue and black dots are visual and photometric CCD observations respectively from COBS or the MPC.
The gray curve is based on the absolute magnitude and slope parameter as calculated from the original MPEC, or the latest values provided by the MPC (11.50 + 5 log[∆] + 10.00 log[r]), whereas the red curve is being recalculated every 6 hours based on the available COBS/MPC observations (currently 7.44 + 5 log[∆] + 15.69 log[r]).
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.
A more printer-friendly version of the same chart can be found further down this page as well.
The following chart shows the current location of the comet in a smaller, upside-down telescopic field of view.
A printable version of the short-term path of the comet in a field of view that is optimized for (~10x50) binoculars and finderscopes.
Ephemerides:
Date Time RA (2000) DEC (2000) delta radius elong phase PA magn
2024-07-26 00:00 UT 23 53 24.1 +11 28 41 15.497 16.021 119.4 3.2 240 32.3
2024-07-26 23:33 UT 23 53 14.6 +11 28 12 15.488 16.026 120.4 3.1 239 32.3
2024-07-27 00:00 UT 23 53 14.4 +11 28 12 15.488 16.027 120.4 3.1 239 32.3
2024-07-28 00:00 UT 23 53 04.5 +11 27 41 15.480 16.032 121.4 3.1 239 32.3
2024-07-29 00:00 UT 23 52 54.4 +11 27 08 15.471 16.038 122.3 3.1 239 32.3
2024-07-30 00:00 UT 23 52 44.2 +11 26 34 15.463 16.043 123.3 3.0 239 32.3
2024-07-31 00:00 UT 23 52 33.7 +11 25 57 15.455 16.049 124.3 3.0 238 32.3
2024-08-01 00:00 UT 23 52 23.0 +11 25 19 15.447 16.055 125.3 3.0 238 32.3
2024-08-02 00:00 UT 23 52 12.2 +11 24 40 15.439 16.060 126.2 2.9 238 32.3
2024-08-03 00:00 UT 23 52 01.1 +11 23 58 15.432 16.066 127.2 2.9 237 32.3
2024-08-04 00:00 UT 23 51 49.9 +11 23 15 15.424 16.072 128.2 2.8 237 32.3
2024-08-05 00:00 UT 23 51 38.5 +11 22 30 15.417 16.077 129.2 2.8 237 32.3
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.