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Asteroid Near-Earth

2019 GK21

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(2019 GK21)

Where is it now

Distance from Sun
1.021 AU
True anomaly
221.56°
Distance from Earth
1.53 AU
As of
19 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 — 0.996 AU from the Sun Earth 2019 GK21 — 1.021 AU from the Sun 2019 GK21
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2019 GK21 is 1.53 AU from Earth today (12.7 light-minutes).

In the sky

Right ascension
16h 22m 39s
Declination
-25° 32′ 39″
Constellation
Scorpius
Distance from Earth
1.53 AU
Elongation from the Sun
41.13° — near the Sun — look low at dusk or dawn

Favours the southern hemisphere; low or below the horizon from far north.

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
0.861 AU
Eccentricity
0.3406
Inclination
5.92°
Orbital period
291.7 days
Perihelion
0.568 AU
Aphelion
1.154 AU
Longitude of ascending node
19.46°
Argument of periapsis
46.61°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 1.0 LD
0.0027 AU
Tisserand (Jupiter)
6.806

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
82
Data arc
4.04 years
First observed
14 April 2019
Last observed
28 April 2023
Residual RMS
0.51 ″
Solution · Otto Matic
15 May 2023

Visual & observation

Absolute magnitude (H)
25.7

Discovery & classification

Aten Near-Earth Object

Close approaches 135 on record

Flyby geometry
Ecliptic flyby of 2019 GK21 at 2027-04-18 10:45 UTC Top-down view of the ecliptic, Earth at the centre, for the 2027-04-18 10:45 UTC close approach of 2019 GK21. Catalogue miss distance 31.7 LD · 1.22 × 10⁷ km. The curve is the geocentric path from 2027-04-15 to 2027-04-21, 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 31.7 LD · 1.22 × 10⁷ km 2027-04-18 10:45 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2027-04-18 10:45 UTC close approach of 2019 GK21. Catalogue miss distance 31.7 LD · 1.22 × 10⁷ km. The curve is the geocentric path from 2027-04-15 to 2027-04-21, 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
2027-04-18 10:45:00 Earth 0.0815 AU 31.7 LD 7.2 km/s
2027-10-05 14:24:00 Earth 0.3646 AU 141.9 LD 11.8 km/s
2031-04-28 02:09:00 Earth 0.118 AU 45.9 LD 7 km/s
2031-09-27 22:33:00 Earth 0.3481 AU 135.5 LD 10.7 km/s
2031-12-02 15:02:00 Venus 0.0673 AU 26.2 LD 8.8 km/s
2034-02-12 04:58:00 Venus 0.0151 AU 5.9 LD 11.2 km/s
2035-05-07 13:20:00 Earth 0.1423 AU 55.4 LD 7.1 km/s
2035-09-20 18:45:00 Earth 0.3317 AU 129.1 LD 9.7 km/s
2039-05-11 01:22:00 Earth 0.1485 AU 57.8 LD 7.1 km/s
2039-09-17 20:25:00 Earth 0.3247 AU 126.4 LD 9.2 km/s

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

Sources