Asteroid 17 Thetis
Asteroid 17 Thetis is a large main-belt asteroid that was discovered on April 17, 1852, by the German astronomer Robert Luther at Bilk Observatory in Düsseldorf. It is named after Thetis, a sea goddess in Greek mythology who is the mother of Achilles. Thetis has an estimated diameter of about 90 kilometers and orbits the Sun at an average distance of about 2.4 astronomical units (AU), with an orbital period of about 3.6 years. Its rotation period is estimated to be about 6.4 hours. Little is known about the surface features or composition of Thetis, but its relatively low density suggests that it may be a C-type asteroid, composed of carbonaceous materials.
The current Right Ascension of Asteroid 17 Thetis is 17h 50m 42s and the Declination is -21° 27’ 11” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom ). The current magnitude of Asteroid 17 Thetis is 12.47 (JPL).
- 17 Thetis is below the horizon from Greenwich, United Kingdom .
- Given its current magnitude, 17 Thetis is visible with the help of a telescope having an aperture of 4 inches (100mm) or more.
- Go to interactive sky chart
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Asteroid 17 Thetis Position and Finder Charts
Below we provide Asteroid 17 Thetis finder charts showing where the object is right now in the sky with respect to the brightest stars. The first finder chart has a field of view of 50 degrees, while the second one has a field of view of 10 degrees. Click on each finder chart to access a full screen interactive Online Planetarium.
Higher precision deep sky finder chart, 60 arcmin wide, showing where Asteroid 17 Thetis is right now. Click on the image to see a more detailed fullscreen tracker view.
Also check out Where is Asteroid 17 Thetis?, a page that provides all the information needed to find Asteroid 17 Thetis in the sky and additional links to sky charts.
Asteroid 17 Thetis Distance from Earth
The distance of Asteroid 17 Thetis from Earth is currently 460,194,311 kilometers, equivalent to 3.076209 Astronomical Units. Light takes 25 minutes and 35.0430 seconds to travel from Asteroid 17 Thetis and arrive to us.
The following chart shows the distance of Asteroid 17 Thetis 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.
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 17 Thetis from Earth is also available as a real time updated value in the Live Position and Data Tracker.
Closest Approach of Asteroid 17 Thetis to Earth
Between 1 January 1900 and 31 December 2099, the closest approach of Asteroid 17 Thetis to Earth happens on Wed Jun 15 1938 at a distance of 1.120642 Astronomical Units, or 167,645,665 kilometers:
NOTE: values for the closest approach are computed with a sampling interval of 1 day.
Asteroid 17 Thetis Brightness and Light Curve
The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 17 Thetis, 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.
Asteroid 17 Thetis Orbital Elements
|Perihelion distance||q||2.14367299 AU
|Date of perihelion transit||Tp||2023-Oct-22 21:25:10
|Next perihelion transit||2027-Sep-10 21:36
|Argument of perihelion||peri||135.72403018034°|
|Longitude of the ascending node||node||125.53993295224°|
Visualization of Asteroid 17 Thetis Orbit
This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid 17 Thetis with respect of the Sun and the orbits of the major planets. The position of Asteroid 17 Thetis 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!
Asteroid 17 Thetis Physical Data
The following shows the known values of the most important physical parameters of Asteroid 17 Thetis. Source: JPL Small-Body Database
|Physical Parameter||Value||Relative to Earth|
|Sideral Rotation||12.2705 hours||0.5127|
Asteroid 17 Thetis 15 Days Ephemeris
The following table lists the ephemerides of Asteroid 17 Thetis computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid 17 Thetis in our Online Planetarium at the chosen date.
|2023 Nov 26||17h 32m 15s||-21° 08’ 31”||12.52||Ophiucus|
|2023 Nov 27||17h 34m 33s||-21° 11’ 20”||12.51||Ophiucus|
|2023 Nov 28||17h 36m 52s||-21° 13’ 59”||12.51||Ophiucus|
|2023 Nov 29||17h 39m 11s||-21° 16’ 32”||12.50||Ophiucus|
|2023 Nov 30||17h 41m 30s||-21° 18’ 56”||12.49||Ophiucus|
|2023 Dec 01||17h 43m 50s||-21° 21’ 14”||12.49||Sagittarius|
|2023 Dec 02||17h 46m 09s||-21° 23’ 21”||12.48||Sagittarius|
|2023 Dec 03||17h 48m 29s||-21° 25’ 23”||12.48||Sagittarius|
|2023 Dec 04||17h 50m 48s||-21° 27’ 15”||12.47||Sagittarius|
|2023 Dec 05||17h 53m 08s||-21° 28’ 59”||12.46||Sagittarius|
|2023 Dec 06||17h 55m 27s||-21° 30’ 37”||12.46||Sagittarius|
|2023 Dec 07||17h 57m 47s||-21° 32’ 04”||12.45||Sagittarius|
|2023 Dec 08||18h 00m 09s||-21° 33’ 24”||12.44||Sagittarius|
|2023 Dec 09||18h 02m 29s||-21° 34’ 37”||12.43||Sagittarius|