Skip to content
Public Universe
Asteroid Near-Earth

2019 QC4

Add to an observing list or journal →

(2019 QC4)

Where is it now

Distance from Sun
1.091 AU
True anomaly
181.12°
Distance from Earth
0.391 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 2019 QC4 — 1.091 AU from the Sun 2019 QC4
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2019 QC4 is 0.391 AU from Earth today (3.3 light-minutes).

In the sky

Right ascension
20h 02m 16s
Declination
-27° 50′ 50″
Constellation
Sagittarius
Distance from Earth
0.39 AU
Elongation from the Sun
93.06° — 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
0.791 AU
Eccentricity
0.3796
Inclination
3.87°
Orbital period
257 days
Perihelion
0.491 AU
Aphelion
1.091 AU
Longitude of ascending node
140.71°
Argument of periapsis
40.78°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 5.1 LD
0.0131 AU
Tisserand (Jupiter)
7.298

Orbit quality

Orbit poorly determined (uncertainty code 7).

Observations used
62
Data arc
25 days
First observed
27 August 2019
Last observed
21 September 2019
Residual RMS
0.43 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
23.48

Discovery & classification

Aten Near-Earth Object

Close approaches 182 on record

Flyby geometry
Ecliptic flyby of 2019 QC4 at 2027-01-29 09:51 UTC Top-down view of the ecliptic, Earth at the centre, for the 2027-01-29 09:51 UTC close approach of 2019 QC4. Catalogue miss distance 168.0 LD · 6.46 × 10⁷ km. The curve is the geocentric path from 2027-01-26 to 2027-02-01, 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 168.0 LD · 6.46 × 10⁷ km 2027-01-29 09:51 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2027-01-29 09:51 UTC close approach of 2019 QC4. Catalogue miss distance 168.0 LD · 6.46 × 10⁷ km. The curve is the geocentric path from 2027-01-26 to 2027-02-01, 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
2027-01-29 09:51:00 Earth 0.4318 AU 168.0 LD 14.3 km/s
2027-03-31 11:34:00 Venus 0.0742 AU 28.9 LD 16.1 km/s
2031-10-17 02:57:00 Earth 0.0856 AU 33.3 LD 7.5 km/s
2032-03-03 18:19:00 Venus 0.1103 AU 42.9 LD 18.2 km/s
2033-08-30 15:09:00 Earth 0.3524 AU 137.1 LD 20.5 km/s
2034-02-23 22:42:00 Earth 0.4826 AU 187.8 LD 18.4 km/s
2035-08-10 06:29:00 Merc 0.082 AU 31.9 LD 9.2 km/s
2035-08-10 06:29:00 Mercury 0.082 AU 31.9 LD 9.2 km/s
2036-04-30 20:41:00 Earth 0.4831 AU 188.0 LD 17.1 km/s
2036-10-22 18:55:00 Earth 0.334 AU 130.0 LD 19.5 km/s

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

Sources