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Asteroid Near-Earth

2017 TG5

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(2017 TG5)

Where is it now

Distance from Sun
0.811 AU
True anomaly
124.56°
Distance from Earth
1.106 AU
As of
16 October 2026

Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision.

Sun Earth — 0.997 AU from the Sun Earth 2017 TG5 — 0.811 AU from the Sun 2017 TG5
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2017 TG5 is 1.106 AU from Earth today (9.2 light-minutes).

In the sky

Right ascension
16h 31m 11s
Declination
-13° 39′ 34″
Constellation
Ophiuchus
Distance from Earth
1.11 AU
Elongation from the Sun
45.14° — near the Sun — look low at dusk or dawn

Visible from both hemispheres.

From your location

See how high it is right now, whether it is up after civil twilight, and when it rises and sets where you are.

How do I find my coordinates?

Google Maps on a computer

  1. Right-click the spot where you'll be observing.
  2. The first line of the menu is the coordinates, e.g. 51.50722, -0.12758 — click it and they're copied.
  3. Paste them above.

Google Maps on a phone

  1. Press and hold the spot to drop a pin.
  2. The coordinates appear in the search bar (or on the pin's card) — tap to copy, then paste above.

A full Google Maps link works too, but the short maps.app.goo.gl share links don't carry coordinates — copy the numbers instead. We round to about a kilometre; that's all the sky calculation needs.

Know your what3words address? Paste it, e.g. ///filled.count.soap. This is optional — the three words are sent to what3words to convert them, and we don't store the address or the result.

Your location stays in your browser and is sent only for this calculation. Using a what3words address is optional; if you do, the three words go to what3words to be converted and we don't record them. Set a location first, then you can save an email alert for this object. See our privacy policy.

Two-body approximation, good to about a degree for the planets — enough to find the constellation and know whether it is up.

Orbital elements

Semi-major axis
0.76 AU
Eccentricity
0.4578
Inclination
11.56°
Orbital period
241.9 days
Perihelion
0.412 AU
Aphelion
1.108 AU
Longitude of ascending node
202.49°
Argument of periapsis
341.66°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 13.9 LD
0.0357 AU
Tisserand (Jupiter)
7.514

Orbit quality

Orbit poorly determined (uncertainty code 7).

Observations used
56
Data arc
13 days
First observed
14 October 2017
Last observed
27 October 2017
Residual RMS
0.47 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
25.1

Discovery & classification

Aten Near-Earth Object

Close approaches 99 on record

Flyby geometry
Ecliptic flyby of 2017 TG5 at 2027-10-23 05:37 UTC Top-down view of the ecliptic, Earth at the centre, for the 2027-10-23 05:37 UTC close approach of 2017 TG5. Catalogue miss distance 109.2 LD · 4.2 × 10⁷ km. The curve is the geocentric path from 2027-10-20 to 2027-10-26, with a mark at UTC midnights and an arrow for the direction of motion. The circle is the Moon’s mean orbit; the Moon is plotted at closest approach. A ray shows the Sun’s direction. The labelled distance is the full separation. The drawn radius is the part that lies in the ecliptic plane. At closest approach the object is south of the ecliptic. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 109.2 LD · 4.2 × 10⁷ km 2027-10-23 05:37 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2027-10-23 05:37 UTC close approach of 2017 TG5. Catalogue miss distance 109.2 LD · 4.2 × 10⁷ km. The curve is the geocentric path from 2027-10-20 to 2027-10-26, with a mark at UTC midnights and an arrow for the direction of motion. The circle is the Moon’s mean orbit; the Moon is plotted at closest approach. A ray shows the Sun’s direction. The labelled distance is the full separation. The drawn radius is the part that lies in the ecliptic plane. At closest approach the object is south of the ecliptic. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate.

JPL Horizons

When (UTC) Body Distance Lunar distances Relative speed
2027-10-23 05:37:00 Earth 0.2806 AU 109.2 LD 20.3 km/s
2029-10-20 00:36:00 Earth 0.3554 AU 138.3 LD 22.8 km/s
2031-03-07 09:19:00 Venus 0.1073 AU 41.8 LD 18.8 km/s
2031-10-17 13:19:00 Earth 0.4306 AU 167.6 LD 25.3 km/s
2039-10-16 08:37:00 Venus 0.1229 AU 47.8 LD 20.5 km/s
2046-09-09 13:18:00 Earth 0.4319 AU 168.1 LD 24.2 km/s
2048-05-26 02:56:00 Venus 0.1482 AU 57.7 LD 22.4 km/s
2048-09-06 07:52:00 Earth 0.3626 AU 141.1 LD 21.7 km/s
2050-09-04 11:22:00 Earth 0.2962 AU 115.3 LD 19.2 km/s
2052-09-02 06:43:00 Earth 0.2352 AU 91.5 LD 16.7 km/s

Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.

Sources