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Asteroid 18 Melpomene

Available Resources

Asteroid 18 Melpomene Sky Charts and Coordinates

This is a simplified sky chart, showing where Asteroid 18 Melpomene is now with respect to the brightest stars and constellations.

More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.

Asteroid 18 Melpomene in Serpens on February, 23 2019
High Precision Live Sky Chart
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]
17h 52m 15s
-14° 12’ 35”
11.68

Asteroid 18 Melpomene Rise and Set Times

Today's Asteroid 18 Melpomene rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the Europe/London timezone.

Azimuth: 104.2°
Max altitude: 24.3°
Azimuth: 255.8°

Asteroid 18 Melpomene Orbit Diagram

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 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
2019 Feb 16 17h 41m 26s -14° 23’ 36” 11.73 Serpens
2019 Feb 17 17h 42m 57s -14° 22’ 21” 11.73 Serpens
2019 Feb 18 17h 44m 29s -14° 20’ 59” 11.72 Serpens
2019 Feb 19 17h 45m 57s -14° 19’ 33” 11.71 Serpens
2019 Feb 20 17h 47m 27s -14° 18’ 02” 11.70 Serpens
2019 Feb 21 17h 48m 56s -14° 16’ 27” 11.69 Serpens
2019 Feb 22 17h 50m 26s -14° 14’ 47” 11.68 Serpens
2019 Feb 23 17h 51m 53s -14° 13’ 01” 11.68 Serpens
2019 Feb 24 17h 53m 21s -14° 11’ 12” 11.67 Serpens
2019 Feb 25 17h 54m 48s -14° 09’ 16” 11.66 Serpens
2019 Feb 26 17h 56m 16s -14° 07’ 18” 11.65 Serpens
2019 Feb 27 17h 57m 42s -14° 05’ 13” 11.64 Serpens
2019 Feb 28 17h 59m 08s -14° 03’ 06” 11.63 Serpens
2019 Mar 01 18h 00m 33s -14° 00’ 52” 11.62 Serpens

Distance of Asteroid 18 Melpomene from Earth

The following chart shows the distance of Asteroid 18 Melpomene from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval.

The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 18 Melpomene is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Asteroid 18 Melpomene from Earth between January 2013 and December 2100

Light Curve of Asteroid 18 Melpomene

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 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 Orbital Elements

The following table lists the orbital elements of Asteroid 18 Melpomene at epoch 26 April 2019 00:00 UTC (JD: 2458600.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.21767437
Orbit inclination i 10.12873160°
Perihelion distance q 1.79673089 AU
268,787,117 km
Aphelion distance Q 2.79657613 AU
418,361,835 km
Semi-major axis a 2.29665351 AU
343,574,476 km
Orbital period period 3.4800 years
1,271.2813 days
Date of perihelion transit Tp 2020-Mar-19 12:23:04
2,458,928.0160 JD
Argument of perihelion peri 227.95085219861°
Longitude of the ascending node node 150.38385683288°
Mean anomaly M 267.25437949687°
Mean motion n 0.28317888°/day
Closest approach to Earth* 2089-Oct-06
Distance of closest approach* 0.81239810 AU
121,533,026 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2100-Dec-31, with a sampling interval of 1 day.