The Solar System at your Fingertips
Dwarf Planets and Asteroids » 

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 Gemini on May, 26 2017
High Precision Live Sky Chart
06h 33m 25s
+18° 33’ 47”
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

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 local timezone Europe/London.

Azimuth: 71.4°
Max altitude: 57.1°
Azimuth: 288.6°

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 MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2017 May 19 11.31 06h 18m 47s +18° 26’ 25” Orion
2017 May 20 11.32 06h 20m 52s +18° 27’ 50” Gemini
2017 May 21 11.32 06h 22m 58s +18° 29’ 07” Gemini
2017 May 22 11.32 06h 25m 04s +18° 30’ 17” Gemini
2017 May 23 11.33 06h 27m 08s +18° 31’ 21” Gemini
2017 May 24 11.33 06h 29m 14s +18° 32’ 17” Gemini
2017 May 25 11.33 06h 31m 19s +18° 33’ 05” Gemini
2017 May 26 11.34 06h 33m 25s +18° 33’ 47” Gemini
2017 May 27 11.34 06h 35m 30s +18° 34’ 21” Gemini
2017 May 28 11.34 06h 37m 36s +18° 34’ 47” Gemini
2017 May 29 11.35 06h 39m 42s +18° 35’ 07” Gemini
2017 May 30 11.35 06h 41m 47s +18° 35’ 20” Gemini
2017 May 31 11.35 06h 43m 51s +18° 35’ 26” Gemini
2017 Jun 01 11.35 06h 45m 56s +18° 35’ 23” Gemini

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 January 2030

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 January 2030

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 30 July 2016 00:00 UTC (JD: 2457600.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.21895068
Orbit inclination i 10.13359512°
Perihelion distance q 1.79288507 AU
268,211,790 km
Aphelion distance Q 2.79808001 AU
418,586,812 km
Semi-major axis a 2.29548254 AU
343,399,301 km
Orbital period period 3.4800 years
1,270.3091 days
Date of perihelion transit Tp 2016-Sep-25 15:38:15
2,457,657.1516 JD
Next perihelion transit 2020-Mar-18 23:03
2,458,927.4607 JD
Argument of perihelion peri 227.85192384631°
Longitude of the ascending node node 150.47011910661°
Mean anomaly M 343.94519537552°
Mean motion n 0.28339559°/day
Closest approach to Earth* 2016-Oct-19
Distance of closest approach* 0.82954014 AU
124,097,439 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2030-Jan-01, with a sampling interval of 1 day.