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Asteroid Near-Earth

2018 YA1

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(2018 YA1)

Where is it now

Distance from Sun
0.673 AU
True anomaly
283.76°
Distance from Earth
1.669 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 YA1 — 0.673 AU from the Sun 2018 YA1
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2018 YA1 is 1.669 AU from Earth today (13.9 light-minutes).

In the sky

Right ascension
13h 23m 33s
Declination
-08° 10′ 58″
Constellation
Virgo
Distance from Earth
1.67 AU
Elongation from the Sun
1.5° — too close to the Sun to observe

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
0.777 AU
Eccentricity
0.2775
Inclination
1.8°
Orbital period
250.3 days
Perihelion
0.562 AU
Aphelion
0.993 AU
Longitude of ascending node
71.03°
Argument of periapsis
204.79°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 2.5 LD
0.0064 AU
Tisserand (Jupiter)
7.436

Orbit quality

Orbit poorly determined (uncertainty code 7).

Observations used
53
Data arc
31 days
First observed
17 December 2018
Last observed
17 January 2019
Residual RMS
0.57 ″
Solution · Otto Matic
8 April 2024

Visual & observation

Absolute magnitude (H)
23.48

Discovery & classification

Aten Near-Earth Object

Close approaches 87 on record

Flyby geometry
Ecliptic flyby of 2018 YA1 at 2027-08-18 09:13 UTC Top-down view of the ecliptic, Earth at the centre, for the 2027-08-18 09:13 UTC close approach of 2018 YA1. Catalogue miss distance 157.8 LD · 6.07 × 10⁷ km. The curve is the geocentric path from 2027-08-15 to 2027-08-21, 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. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 157.8 LD · 6.07 × 10⁷ km 2027-08-18 09:13 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2027-08-18 09:13 UTC close approach of 2018 YA1. Catalogue miss distance 157.8 LD · 6.07 × 10⁷ km. The curve is the geocentric path from 2027-08-15 to 2027-08-21, 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. 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
2027-08-18 09:13:00 Earth 0.4055 AU 157.8 LD 12.1 km/s
2028-01-13 23:38:00 Earth 0.4172 AU 162.4 LD 19.5 km/s
2030-01-21 07:24:00 Earth 0.0926 AU 36.0 LD 8.3 km/s
2031-12-03 17:37:00 Earth 0.1056 AU 41.1 LD 8.9 km/s
2033-12-11 21:52:00 Earth 0.4315 AU 167.9 LD 20 km/s
2034-05-11 03:33:00 Earth 0.4084 AU 158.9 LD 12.5 km/s
2035-09-04 21:40:00 Venus 0.0943 AU 36.7 LD 14.4 km/s
2036-06-17 04:03:00 Earth 0.4526 AU 176.2 LD 15.5 km/s
2038-07-23 04:21:00 Earth 0.4436 AU 172.6 LD 14.8 km/s
2040-08-31 10:05:00 Earth 0.3765 AU 146.5 LD 10.2 km/s

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

Sources