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Asteroid Near-Earth

2025 SZ20

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(2025 SZ20)

Where is it now

Distance from Sun
1.174 AU
True anomaly
175.27°
Distance from Earth
0.37 AU
As of
22 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 2025 SZ20 — 1.174 AU from the Sun 2025 SZ20
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2025 SZ20 is 0.37 AU from Earth today (3.1 light-minutes).

In the sky

Right ascension
06h 35m 47s
Declination
+53° 11′ 32″
Constellation
Auriga
Distance from Earth
0.37 AU
Elongation from the Sun
110.07° — well clear of the Sun

Favours the northern hemisphere; low or below the horizon from far south.

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
0.942 AU
Eccentricity
0.2486
Inclination
13.07°
Orbital period
333.7 days
Perihelion
0.708 AU
Aphelion
1.176 AU
Longitude of ascending node
0.93°
Argument of periapsis
228.63°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 13.8 LD
0.0355 AU
Tisserand (Jupiter)
6.329

Orbit quality

Orbit poorly determined (uncertainty code 6).

Observations used
31
Data arc
10 days
First observed
23 September 2025
Last observed
3 October 2025
Residual RMS
0.49 ″
Solution · Otto Matic
28 July 2026

Visual & observation

Absolute magnitude (H)
25.98

Discovery & classification

Aten Near-Earth Object

Close approaches 38 on record

Flyby geometry
Ecliptic flyby of 2025 SZ20 at 2027-02-25 19:04 UTC Top-down view of the ecliptic, Earth at the centre, for the 2027-02-25 19:04 UTC close approach of 2025 SZ20. Catalogue miss distance 74.1 LD · 2.85 × 10⁷ km. The curve is the geocentric path from 2027-02-22 to 2027-02-28, 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 north of the ecliptic. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 74.1 LD · 2.85 × 10⁷ km 2027-02-25 19:04 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2027-02-25 19:04 UTC close approach of 2025 SZ20. Catalogue miss distance 74.1 LD · 2.85 × 10⁷ km. The curve is the geocentric path from 2027-02-22 to 2027-02-28, 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 north 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
2027-02-25 19:04:00 Earth 0.1904 AU 74.1 LD 9.6 km/s
2039-12-27 01:59:00 Venus 0.1224 AU 47.6 LD 7.9 km/s
2040-03-09 01:03:00 Venus 0.1494 AU 58.2 LD 8.4 km/s
2041-10-29 08:21:00 Venus 0.0596 AU 23.2 LD 10.6 km/s
2046-09-17 17:30:00 Earth 0.0809 AU 31.5 LD 11.5 km/s
2057-09-23 17:37:00 Earth 0.1167 AU 45.4 LD 8 km/s
2059-02-13 02:52:00 Earth 0.174 AU 67.7 LD 9.8 km/s
2067-09-20 08:59:00 Earth 0.1862 AU 72.5 LD 14.4 km/s
2071-12-23 11:29:00 Venus 0.107 AU 41.6 LD 8.1 km/s
2073-10-25 07:44:00 Venus 0.0663 AU 25.8 LD 11.1 km/s

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

Sources