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Comet C/2018 Y1 (Iwamoto)

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Comet C/2018 Y1 (Iwamoto) Position

Comet C/2018 Y1 (Iwamoto) is currently in the constellation of Perseus. The current Right Ascension is 04h 44m 55s and the Declination is +38° 28’ 19”.

04h 44m 55s
+38° 28’ 19”

Simplified sky chart showing where Comet C/2018 Y1 (Iwamoto) is right now in the sky with respect to the brightest stars and constellations (see fuillscreen Online Planetarium)

Map showing Comet C/2018 Y1 (Iwamoto) in Perseus on July, 24 2019
Field of view: 60x30 degrees
View fullscreen
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Hihgher precision deep sky finder chart showing where Comet C/2018 Y1 (Iwamoto) is right now (view fullscreen)

C/2018 Y1 (Iwamoto)
RA: 04h 44m 55s
Dec: +38° 28’ 19”
Deep sky finder chart for Comet C/2018 Y1 (Iwamoto)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Comet C/2018 Y1 (Iwamoto)?, a page that provides all the information needed to find Comet C/2018 Y1 (Iwamoto) in the sky and additional links to sky charts.

Comet C/2018 Y1 (Iwamoto) Distance

The distance of Comet C/2018 Y1 (Iwamoto) from Earth is currently 479,609,639 kilometers, equivalent to 3.205992 Astronomical Units. Light takes 26 minutes and 39.8056 seconds to travel from Comet C/2018 Y1 (Iwamoto) and arrive to us.

26 minutes and 39.8056 seconds

The following chart shows the distance of Comet C/2018 Y1 (Iwamoto) from Earth as a function of time. In the chart the distance data is measured in Astronomical Units and sampled with an interval of 1 day.

Distance of Comet C/2018 Y1 (Iwamoto) from Earth between January 2013 and December 2100

The value of the reported distance might be somewhat inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of C/2018 Y1 (Iwamoto) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Comet C/2018 Y1 (Iwamoto) to Earth

Between January 2013 and December 2100 the closest approach of Comet C/2018 Y1 (Iwamoto) to Earth happens on Wed Feb 13 2019 at a distance of 0.30385945 Astronomical Units, or 45,456,727 kilometers:

Wed Feb 13 2019

NOTE: values for the closest approach are computed with a sampling interval of 1 day.

Comet C/2018 Y1 (Iwamoto) brightness

The current visual magnitude of Comet C/2018 Y1 (Iwamoto) is 21.98.


The observed magnitude and coma diameter values are derived from the Comet Observers Database by averaging the values reported in recent observations (more recent than 4 days), when available. The Estimated Magnitude comes from the JPL Horizons ephemerides service and might be inaccurate given the highly dynamic and unpredictable behvior of comets. When available, please refer to the Observed Magnitude value and consider the Estimated Magnitude as a directional indication. We acknowledge with thanks the comet observations from the COBS Comet Observation Database contributed by observers worldwide and used in this table to report recent comet observations.

The following chart is the predicted light curve (visual magnitude as a function of time) of Comet C/2018 Y1 (Iwamoto), according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.

Predicted magnitude of Comet C/2018 Y1 (Iwamoto) between January 2013 and December 2100

Comet C/2018 Y1 (Iwamoto) rise and set times

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's Comet C/2018 Y1 (Iwamoto) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 0.0°
Max altitude: 77.0°
Azimuth: 0.0°
Comet C/2018 Y1 (Iwamoto) is above the horizon from Greenwich, United Kingdom

The rise and set times are defined as the time at which the upper limb of Comet C/2018 Y1 (Iwamoto) touches the horizon, consideting the effect of the atmospheric refraction. As the atmoshpere conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Comet C/2018 Y1 (Iwamoto) Orbital Elements

The following table lists the orbital elements of Comet C/2018 Y1 (Iwamoto) at epoch 12 February 2019 00:00 UTC (JD: 2458527.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.98827307
Orbit inclination i 160.39765099°
Perihelion distance q 1.28687141 AU
192,513,223 km
Aphelion distance Q 218.18592436 AU
32,640,149,767 km
Semi-major axis a 109.73639789 AU
16,416,331,495 km
Orbital period period 1,149.5700 years
419,879.3124 days
Date of perihelion transit Tp 2019-Feb-07 00:23:15
2,458,521.5162 JD
Next perihelion transit 3168-Sep-10 07:53
2,878,400.8286 JD
Argument of perihelion peri 358.04449957491°
Longitude of the ascending node node 147.48131140455°
Mean anomaly M 0.0051304860915002°
Mean motion n 0.00085739°/day

Visualization of Comet C/2018 Y1 (Iwamoto) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Comet C/2018 Y1 (Iwamoto) with respect of the Sun and the orbits of the major planets. The position of Comet C/2018 Y1 (Iwamoto) and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!

Orbit Diagram of Comet C/2018 Y1 (Iwamoto)
View Comet C/2018 Y1 (Iwamoto) in the 3D Solar System Simulator

Comet C/2018 Y1 (Iwamoto) 15 Days Ephemeris

The following table lists the ephemerides of Comet C/2018 Y1 (Iwamoto) computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Comet C/2018 Y1 (Iwamoto) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2019 Jul 17 04h 45m 41s +37° 52’ 31” 21.79 Perseus
2019 Jul 18 04h 45m 37s +37° 57’ 24” 21.82 Perseus
2019 Jul 19 04h 45m 33s +38° 02’ 20” 21.85 Perseus
2019 Jul 20 04h 45m 28s +38° 07’ 17” 21.88 Perseus
2019 Jul 21 04h 45m 21s +38° 12’ 17” 21.90 Perseus
2019 Jul 22 04h 45m 15s +38° 17’ 21” 21.93 Perseus
2019 Jul 23 04h 45m 06s +38° 22’ 27” 21.96 Perseus
2019 Jul 24 04h 44m 57s +38° 27’ 34” 21.98 Perseus
2019 Jul 25 04h 44m 47s +38° 32’ 44” 22.01 Perseus
2019 Jul 26 04h 44m 35s +38° 37’ 58” 22.04 Perseus
2019 Jul 27 04h 44m 21s +38° 43’ 14” 22.06 Perseus
2019 Jul 28 04h 44m 08s +38° 48’ 32” 22.09 Perseus
2019 Jul 29 04h 43m 51s +38° 53’ 52” 22.12 Perseus
2019 Jul 30 04h 43m 36s +38° 59’ 14” 22.14 Perseus