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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 Cancer on July, 25 2017
High Precision Live Sky Chart
08h 34m 36s
+16° 00’ 14”
11.25
 = 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: 74.0°
Max altitude: 54.5°
Azimuth: 286.0°

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 Jul 18 11.30 08h 21m 05s +16° 35’ 11” Cancer
2017 Jul 19 11.29 08h 23m 00s +16° 30’ 24” Cancer
2017 Jul 20 11.29 08h 24m 57s +16° 25’ 33” Cancer
2017 Jul 21 11.28 08h 26m 53s +16° 20’ 39” Cancer
2017 Jul 22 11.28 08h 28m 50s +16° 15’ 38” Cancer
2017 Jul 23 11.27 08h 30m 44s +16° 10’ 35” Cancer
2017 Jul 24 11.26 08h 32m 40s +16° 05’ 26” Cancer
2017 Jul 25 11.25 08h 34m 36s +16° 00’ 14” Cancer
2017 Jul 26 11.25 08h 36m 30s +15° 54’ 56” Cancer
2017 Jul 27 11.24 08h 38m 26s +15° 49’ 35” Cancer
2017 Jul 28 11.23 08h 40m 19s +15° 44’ 09” Cancer
2017 Jul 29 11.22 08h 42m 14s +15° 38’ 39” Cancer
2017 Jul 30 11.22 08h 44m 08s +15° 33’ 06” Cancer
2017 Jul 31 11.21 08h 46m 01s +15° 27’ 29” Cancer

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 03 September 2017 00:00 UTC (JD: 2458000.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.21882966
Orbit inclination i 10.13363694°
Perihelion distance q 1.79284274 AU
268,205,458 km
Aphelion distance Q 2.79730274 AU
418,470,534 km
Semi-major axis a 2.29507274 AU
343,337,996 km
Orbital period period 3.4800 years
1,269.9690 days
Date of perihelion transit Tp 2016-Sep-25 13:29:00
2,457,657.0618 JD
Next perihelion transit 2020-Mar-18 12:44
2,458,927.0308 JD
Argument of perihelion peri 227.82061873802°
Longitude of the ascending node node 150.46689309882°
Mean anomaly M 97.354935021187°
Mean motion n 0.28347149°/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.