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Asteroid Near-Earth

661492

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661492 (2004 TX37)

Where is it now

Distance from Sun
5.348 AU
True anomaly
178.6°
Distance from Earth
4.638 AU
As of
11 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.

Orbit of Mercury Orbit of Venus Orbit of Mars Sun Earth — 0.998 AU from the Sun Earth 661492 — 5.348 AU from the Sun 661492
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 661492 is 4.638 AU from Earth today (38.6 light-minutes).

In the sky

Right ascension
22h 01m 11s
Declination
-07° 45′ 26″
Constellation
Aquarius
Distance from Earth
4.65 AU
Elongation from the Sun
130.35° — 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
3.275 AU
Eccentricity
0.6338
Inclination
4.92°
Orbital period
5.93 years
Perihelion
1.199 AU
Aphelion
5.35 AU
Longitude of ascending node
204.1°
Argument of periapsis
314.97°
Epoch · J2000
2461200.5
Orbit class · AMO
Amor
Earth MOID · 84.8 LD
0.218 AU
Tisserand (Jupiter)
2.812

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
154
Data arc
21.96 years
First observed
29 September 2003
Last observed
15 September 2025
Residual RMS
0.61 ″
Solution · Otto Matic
25 August 2026

Visual & observation

Absolute magnitude (H)
15.63

Discovery & classification

Discovered by
Spacewatch
Discovery date
17 September 2004
Discovery site
Kitt Peak

Also known as 2004 TX37 · 2010 RB146 · 2016 TB42

Amor Near-Earth Object

Close approaches 9 on record

Flyby geometry
Ecliptic flyby of 661492 at 2053-02-25 04:17 UTC Top-down view of the ecliptic, Earth at the centre, for the 2053-02-25 04:17 UTC close approach of 661492. Catalogue miss distance 75.4 LD · 2.9 × 10⁷ km. The curve is the geocentric path from 2053-02-22 to 2053-02-28, 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 south of the ecliptic. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 75.4 LD · 2.9 × 10⁷ km 2053-02-25 04:17 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2053-02-25 04:17 UTC close approach of 661492. Catalogue miss distance 75.4 LD · 2.9 × 10⁷ km. The curve is the geocentric path from 2053-02-22 to 2053-02-28, 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 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
2034-04-17 18:15:00 Juptr 1.5348 AU 597.3 LD 11.4 km/s
2053-02-25 04:17:00 Earth 0.1938 AU 75.4 LD 6.8 km/s
2140-05-29 16:04:00 Juptr 1.9993 AU 778.1 LD 13 km/s
2152-02-21 04:18:00 Juptr 1.4646 AU 570.0 LD 11.1 km/s
2163-12-22 07:30:00 Juptr 1.3443 AU 523.2 LD 10.6 km/s
2175-11-29 02:12:00 Juptr 1.7122 AU 666.3 LD 11.8 km/s

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

Sources