Skip to content
Public Universe
Asteroid Near-Earth

2004 SW26

Add to an observing list or journal →

(2004 SW26)

Where is it now

Distance from Sun
0.944 AU
True anomaly
148.29°
Distance from Earth
0.89 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 2004 SW26 — 0.944 AU from the Sun 2004 SW26
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2004 SW26 is 0.89 AU from Earth today (7.4 light-minutes).

In the sky

Right ascension
17h 30m 02s
Declination
-12° 57′ 01″
Constellation
Serpens
Distance from Earth
0.89 AU
Elongation from the Sun
59.75° — near the Sun — look low at dusk or dawn

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
0.738 AU
Eccentricity
0.4162
Inclination
18.41°
Orbital period
231.5 days
Perihelion
0.431 AU
Aphelion
1.045 AU
Longitude of ascending node
180.36°
Argument of periapsis
359.48°
Epoch · J2000
2453272.5
Orbit class · ATE
Aten
Earth MOID · 16.1 LD
0.0414 AU
Tisserand (Jupiter)
7.702

Orbit quality

Orbit very uncertain — the object may be effectively lost (uncertainty code 8).

Observations used
25
Data arc
24 hours
First observed
23 September 2004
Last observed
24 September 2004
Residual RMS
0.79 ″
Solution · Otto Matic
14 April 2021

Visual & observation

Absolute magnitude (H)
25.66

Discovery & classification

Aten Near-Earth Object

Close approaches 61 on record

Flyby geometry
Ecliptic flyby of 2004 SW26 at 2028-09-09 21:47 UTC Top-down view of the ecliptic, Earth at the centre, for the 2028-09-09 21:47 UTC close approach of 2004 SW26. Catalogue miss distance 134.9 LD · 5.18 × 10⁷ km. The curve is the geocentric path from 2028-09-06 to 2028-09-12, 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 134.9 LD · 5.18 × 10⁷ km 2028-09-09 21:47 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2028-09-09 21:47 UTC close approach of 2004 SW26. Catalogue miss distance 134.9 LD · 5.18 × 10⁷ km. The curve is the geocentric path from 2028-09-06 to 2028-09-12, 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
2028-09-09 21:47:00 Earth 0.3465 AU 134.9 LD 19.9 km/s
2035-09-09 01:07:00 Earth 0.2041 AU 79.4 LD 15.2 km/s
2115-10-07 21:03:00 Earth 0.3984 AU 155.0 LD 21.4 km/s
2118-09-11 16:02:00 Earth 0.3417 AU 133.0 LD 19.8 km/s
2125-09-09 20:17:00 Earth 0.2055 AU 80.0 LD 15.3 km/s
2127-10-10 16:45:00 Earth 0.1844 AU 71.8 LD 14.2 km/s
2132-09-14 05:30:00 Earth 0.0904 AU 35.2 LD 12 km/s
2134-10-09 20:28:00 Earth 0.3186 AU 124.0 LD 18.6 km/s
2137-09-13 17:18:00 Earth 0.4207 AU 163.7 LD 22.5 km/s
2139-09-26 18:26:00 Earth 0.044 AU 17.1 LD 11.1 km/s

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

Sources