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Asteroid 18 Melpomene

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Asteroid 18 Melpomene Position

Asteroid 18 Melpomene is currently in the constellation of Cetus. The current Right Ascension is 01h 12m 48s and the Declination is +02° 06’ 25”.

01h 12m 48s
+02° 06’ 25”

Simplified sky chart showing where Asteroid 18 Melpomene is right now in the sky with respect to the brightest stars and constellations (see full screen Online Planetarium)

Map showing Asteroid 18 Melpomene in Cetus on March, 29 2020
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]

Higher precision deep sky finder chart showing where Asteroid 18 Melpomene is right now (view fullscreen)

18 Melpomene
RA: 01h 12m 48s
Dec: +02° 06’ 25”
Deep sky finder chart for Asteroid 18 Melpomene
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Asteroid 18 Melpomene?, a page that provides all the information needed to find Asteroid 18 Melpomene in the sky and additional links to sky charts.

Asteroid 18 Melpomene Distance

The distance of Asteroid 18 Melpomene from Earth is currently 414,724,031 kilometers, equivalent to 2.772259 Astronomical Units. Light takes 23 minutes and 3.3705 seconds to travel from Asteroid 18 Melpomene and arrive to us.

23 minutes and 3.3705 seconds

The following chart shows the distance of Asteroid 18 Melpomene 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 Asteroid 18 Melpomene 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 18 Melpomene from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Asteroid 18 Melpomene to Earth

Between January 2013 and December 2100 the closest approach of Asteroid 18 Melpomene to Earth happens on Thu Oct 6 2089 at a distance of 0.81239808 Astronomical Units, or 121,533,023 kilometers:

Thu Oct 6 2089

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

Asteroid 18 Melpomene brightness

The current visual magnitude of Asteroid 18 Melpomene is 10.48.


The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 18 Melpomene, 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 Asteroid 18 Melpomene between January 2013 and December 2100

Asteroid 18 Melpomene rise and set times

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

Today's Asteroid 18 Melpomene rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 87.9°
Max altitude: 40.6°
Azimuth: 272.2°
Asteroid 18 Melpomene is above the horizon from Greenwich, United Kingdom

The rise and set times are defined as the time at which the upper limb of Asteroid 18 Melpomene touches the horizon, considering the effect of the atmospheric refraction. As the atmospheric conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Asteroid 18 Melpomene Orbital Elements

The following table lists the orbital elements of Asteroid 18 Melpomene at epoch 30 May 2020 00:00 UTC (JD: 2459000.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.21750533
Orbit inclination i 10.13158957°
Perihelion distance q 1.79637982 AU
268,734,596 km
Aphelion distance Q 2.79503758 AU
418,131,672 km
Semi-major axis a 2.29570870 AU
343,433,134 km
Orbital period period 3.4800 years
1,270.4969 days
Date of perihelion transit Tp 2020-Mar-19 18:51:51
2,458,928.2860 JD
Next perihelion transit 2023-Sep-11 06:47
2,460,198.7829 JD
Argument of perihelion peri 228.07768634716°
Longitude of the ascending node node 150.36518232485°
Mean anomaly M 20.462102196045°
Mean motion n 0.28335371°/day

Visualization of Asteroid 18 Melpomene Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid 18 Melpomene with respect of the Sun and the orbits of the major planets. The position of Asteroid 18 Melpomene 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 Asteroid 18 Melpomene
View Asteroid 18 Melpomene in the 3D Solar System Simulator

Asteroid 18 Melpomene Physical Data

The following shows the known values of the most important physical parameters of Asteroid 18 Melpomene. Source: JPL Small-Body Database

Physical Parameter Value Relative to Earth
Diameter 140.57 km 0.0110
Sideral Rotation 11.5700 hours 0.4834
Absolute Magnitude 6.51
Geometric Albedo 0.2225

Asteroid 18 Melpomene 15 Days Ephemeris

The following table lists the ephemerides of Asteroid 18 Melpomene computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid 18 Melpomene in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2020 Mar 22 00h 54m 38s +00° 27’ 38” 10.52 Cetus
2020 Mar 23 00h 57m 02s +00° 40’ 51” 10.51 Cetus
2020 Mar 24 00h 59m 27s +00° 54’ 02” 10.51 Cetus
2020 Mar 25 01h 01m 53s +01° 07’ 13” 10.50 Cetus
2020 Mar 26 01h 04m 17s +01° 20’ 21” 10.50 Cetus
2020 Mar 27 01h 06m 42s +01° 33’ 28” 10.49 Cetus
2020 Mar 28 01h 09m 06s +01° 46’ 32” 10.49 Cetus
2020 Mar 29 01h 11m 31s +01° 59’ 35” 10.48 Cetus
2020 Mar 30 01h 13m 56s +02° 12’ 34” 10.48 Cetus
2020 Mar 31 01h 16m 22s +02° 25’ 32” 10.47 Cetus
2020 Apr 01 01h 18m 47s +02° 38’ 27” 10.47 Cetus
2020 Apr 02 01h 21m 12s +02° 51’ 20” 10.46 Pisces
2020 Apr 03 01h 23m 38s +03° 04’ 09” 10.46 Pisces
2020 Apr 04 01h 26m 03s +03° 16’ 55” 10.45 Pisces