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Asteroid Near-Earth

2018 GY

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(2018 GY)

Where is it now

Distance from Sun
0.734 AU
True anomaly
108.3°
Distance from Earth
1.4 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 2018 GY — 0.734 AU from the Sun 2018 GY
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2018 GY is 1.4 AU from Earth today (11.6 light-minutes).

In the sky

Right ascension
11h 31m 47s
Declination
-00° 33′ 13″
Constellation
Leo
Distance from Earth
1.4 AU
Elongation from the Sun
30.09° — 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
0.767 AU
Eccentricity
0.4062
Inclination
8.75°
Orbital period
245.2 days
Perihelion
0.455 AU
Aphelion
1.078 AU
Longitude of ascending node
176.9°
Argument of periapsis
204.98°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 3.5 LD
0.009 AU
Tisserand (Jupiter)
7.48

Orbit quality

Orbit very well determined (uncertainty code 1).

Observations used
34
Data arc
4.03 years
First observed
18 March 2018
Last observed
28 March 2022
Residual RMS
0.51 ″
Solution · Otto Matic
20 December 2022

Visual & observation

Absolute magnitude (H)
24.83

Discovery & classification

Aten Near-Earth Object

Close approaches 197 on record

Flyby geometry
Ecliptic flyby of 2018 GY at 2028-03-15 16:41 UTC Top-down view of the ecliptic, Earth at the centre, for the 2028-03-15 16:41 UTC close approach of 2018 GY. Catalogue miss distance 100.5 LD · 3.86 × 10⁷ km. The curve is the geocentric path from 2028-03-12 to 2028-03-18, 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. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 100.5 LD · 3.86 × 10⁷ km 2028-03-15 16:41 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2028-03-15 16:41 UTC close approach of 2018 GY. Catalogue miss distance 100.5 LD · 3.86 × 10⁷ km. The curve is the geocentric path from 2028-03-12 to 2028-03-18, 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. 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
2027-03-26 23:36:00 Venus 0.1417 AU 55.1 LD 11.4 km/s
2028-03-15 16:41:00 Earth 0.2583 AU 100.5 LD 17.9 km/s
2028-08-20 13:48:00 Earth 0.4909 AU 191.1 LD 17.2 km/s
2030-03-19 04:47:00 Earth 0.341 AU 132.7 LD 20.7 km/s
2032-03-21 23:52:00 Earth 0.4237 AU 164.9 LD 23.4 km/s
2049-04-30 00:41:00 Earth 0.4436 AU 172.6 LD 23.2 km/s
2050-12-20 09:02:00 Venus 0.1315 AU 51.2 LD 11.9 km/s
2051-05-03 12:45:00 Earth 0.366 AU 142.4 LD 20.5 km/s
2052-11-28 13:18:00 Earth 0.4967 AU 193.3 LD 17.8 km/s
2053-05-05 16:36:00 Earth 0.2916 AU 113.5 LD 17.8 km/s

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

Sources