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Asteroid Near-Earth

2019 UK12

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(2019 UK12)

Where is it now

Distance from Sun
1.023 AU
True anomaly
154.42°
Distance from Earth
0.482 AU
As of
21 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 — 0.995 AU from the Sun Earth 2019 UK12 — 1.023 AU from the Sun 2019 UK12
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2019 UK12 is 0.482 AU from Earth today (4.0 light-minutes).

In the sky

Right ascension
19h 23m 03s
Declination
-28° 45′ 35″
Constellation
Sagittarius
Distance from Earth
0.48 AU
Elongation from the Sun
79.42° — well clear of the Sun

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
0.922 AU
Eccentricity
0.1253
Inclination
5.53°
Orbital period
323.2 days
Perihelion
0.806 AU
Aphelion
1.037 AU
Longitude of ascending node
35.67°
Argument of periapsis
170.69°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 16.0 LD
0.041 AU
Tisserand (Jupiter)
6.476

Orbit quality

Orbit poorly determined (uncertainty code 7).

Observations used
28
Data arc
4 days
First observed
28 October 2019
Last observed
1 November 2019
Residual RMS
0.4 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
25.8

Discovery & classification

Aten Near-Earth Object

Close approaches 53 on record

Flyby geometry
Ecliptic flyby of 2019 UK12 at 2027-05-31 07:42 UTC Top-down view of the ecliptic, Earth at the centre, for the 2027-05-31 07:42 UTC close approach of 2019 UK12. Catalogue miss distance 73.8 LD · 2.84 × 10⁷ km. The curve is the geocentric path from 2027-05-28 to 2027-06-03, 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 73.8 LD · 2.84 × 10⁷ km 2027-05-31 07:42 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2027-05-31 07:42 UTC close approach of 2019 UK12. Catalogue miss distance 73.8 LD · 2.84 × 10⁷ km. The curve is the geocentric path from 2027-05-28 to 2027-06-03, 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
2027-05-31 07:42:00 Earth 0.1897 AU 73.8 LD 5.6 km/s
2027-12-06 04:43:00 Earth 0.1251 AU 48.7 LD 6.7 km/s
2032-09-15 14:45:00 Venus 0.124 AU 48.3 LD 1.2 km/s
2034-09-14 08:19:00 Earth 0.1948 AU 75.8 LD 8.8 km/s
2035-04-07 23:17:00 Earth 0.196 AU 76.3 LD 6.2 km/s
2035-12-01 11:25:00 Earth 0.3717 AU 144.6 LD 14.6 km/s
2038-09-18 14:36:00 Venus 0.1436 AU 55.9 LD 2.6 km/s
2049-09-19 07:48:00 Earth 0.4182 AU 162.7 LD 15.8 km/s
2050-12-05 17:15:00 Earth 0.1425 AU 55.5 LD 7.2 km/s
2057-09-13 18:25:00 Earth 0.1799 AU 70.0 LD 8.2 km/s

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

Sources