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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 Virgo on August, 16 2018
High Precision Live Sky Chart
12h 55m 13s
+01° 51’ 09”
 = 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: 88.1°
Max altitude: 40.4°
Azimuth: 271.9°

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
2018 Aug 09 12h 46m 27s +02° 50’ 42” 12.10 Virgo
2018 Aug 10 12h 47m 39s +02° 42’ 28” 12.10 Virgo
2018 Aug 11 12h 48m 51s +02° 34’ 11” 12.10 Virgo
2018 Aug 12 12h 50m 04s +02° 25’ 54” 12.11 Virgo
2018 Aug 13 12h 51m 18s +02° 17’ 36” 12.11 Virgo
2018 Aug 14 12h 52m 32s +02° 09’ 17” 12.11 Virgo
2018 Aug 15 12h 53m 45s +02° 00’ 56” 12.11 Virgo
2018 Aug 16 12h 55m 00s +01° 52’ 36” 12.11 Virgo
2018 Aug 17 12h 56m 16s +01° 44’ 12” 12.11 Virgo
2018 Aug 18 12h 57m 30s +01° 35’ 49” 12.11 Virgo
2018 Aug 19 12h 58m 46s +01° 27’ 25” 12.12 Virgo
2018 Aug 20 13h 00m 02s +01° 19’ 00” 12.12 Virgo
2018 Aug 21 13h 01m 18s +01° 10’ 35” 12.12 Virgo
2018 Aug 22 13h 02m 35s +01° 02’ 08” 12.12 Virgo

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 2075

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 2075

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 22 March 2018 00:00 UTC (JD: 2458200.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.21861917
Orbit inclination i 10.13235018°
Perihelion distance q 1.79360429 AU
268,319,384 km
Aphelion distance Q 2.79725388 AU
418,463,225 km
Semi-major axis a 2.29542909 AU
343,391,304 km
Orbital period period 3.4800 years
1,270.2648 days
Date of perihelion transit Tp 2016-Sep-25 11:22:37
2,457,656.9740 JD
Next perihelion transit 2020-Mar-18 17:43
2,458,927.2388 JD
Argument of perihelion peri 227.83953986448°
Longitude of the ascending node node 150.46471462727°
Mean anomaly M 154.03823756279°
Mean motion n 0.28340549°/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 2075-Dec-31, with a sampling interval of 1 day.