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Public Universe
Asteroid Near-Earth

2019 UN1

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(2019 UN1)

Where is it now

Distance from Sun
1.197 AU
True anomaly
168.11°
Distance from Earth
0.405 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 UN1 — 1.197 AU from the Sun 2019 UN1
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2019 UN1 is 0.405 AU from Earth today (3.4 light-minutes).

In the sky

Right ascension
20h 53m 26s
Declination
+11° 34′ 20″
Constellation
Delphinus
Distance from Earth
0.41 AU
Elongation from the Sun
109.86° — well clear of the Sun

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
0.851 AU
Eccentricity
0.4291
Inclination
20.82°
Orbital period
286.8 days
Perihelion
0.486 AU
Aphelion
1.216 AU
Longitude of ascending node
215.69°
Argument of periapsis
344.89°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 57.5 LD
0.1478 AU
Tisserand (Jupiter)
6.796

Orbit quality

Orbit reasonably well determined (uncertainty code 3).

Observations used
23
Data arc
4.05 years
First observed
19 October 2019
Last observed
7 November 2023
Residual RMS
0.68 ″
Solution · Otto Matic
8 November 2023

Visual & observation

Absolute magnitude (H)
23.24

Discovery & classification

Aten Near-Earth Object

Close approaches 209 on record

Flyby geometry
Ecliptic flyby of 2019 UN1 at 2027-11-11 11:09 UTC Top-down view of the ecliptic, Earth at the centre, for the 2027-11-11 11:09 UTC close approach of 2019 UN1. Catalogue miss distance 174.2 LD · 6.69 × 10⁷ km. The curve is the geocentric path from 2027-11-08 to 2027-11-14, 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 174.2 LD · 6.69 × 10⁷ km 2027-11-11 11:09 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2027-11-11 11:09 UTC close approach of 2019 UN1. Catalogue miss distance 174.2 LD · 6.69 × 10⁷ km. The curve is the geocentric path from 2027-11-08 to 2027-11-14, 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
2027-11-11 11:09:00 Earth 0.4475 AU 174.2 LD 25.9 km/s
2030-06-16 17:42:00 Earth 0.4744 AU 184.6 LD 17.8 km/s
2030-10-22 00:20:00 Earth 0.2321 AU 90.3 LD 13 km/s
2031-02-09 22:47:00 Earth 0.4889 AU 190.3 LD 15.1 km/s
2033-09-17 05:55:00 Earth 0.4961 AU 193.1 LD 24.4 km/s
2034-11-17 09:39:00 Earth 0.1604 AU 62.4 LD 15.2 km/s
2037-09-19 06:43:00 Earth 0.286 AU 111.3 LD 13.6 km/s
2038-04-04 23:45:00 Merc 0.0776 AU 30.2 LD 24.5 km/s
2038-04-04 23:45:00 Mercury 0.0776 AU 30.2 LD 24.5 km/s
2038-11-09 21:32:00 Earth 0.4826 AU 187.8 LD 27.1 km/s

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

Sources