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Trans-Neptunian object

1999 DA

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(1999 DA)

Where is it now

Distance from Sun
45.387 AU
True anomaly
224.56°
Distance from Earth
46.202 AU
As of
19 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 — 0.996 AU from the Sun Earth 1999 DA — 45.387 AU from the Sun 1999 DA
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 1999 DA is 46.202 AU from Earth today (6.4 light-hours).

In the sky

Right ascension
11h 33m 46s
Declination
+05° 29′ 34″
Constellation
Leo
Distance from Earth
46.19 AU
Elongation from the Sun
35.45° — 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
43.398 AU
Eccentricity
0.0676
Inclination
2.79°
Orbital period
285.9 years
Perihelion
40.462 AU
Aphelion
46.334 AU
Longitude of ascending node
53.97°
Argument of periapsis
252.52°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 15,351.9 LD
39.4475 AU
Tisserand (Jupiter)
5.876

Orbit quality

Orbit reasonably well determined (uncertainty code 4).

Observations used
48
Data arc
25.07 years
First observed
16 February 1999
Last observed
13 March 2024
Residual RMS
0.21 ″
Solution · Otto Matic
15 April 2024

Visual & observation

Absolute magnitude (H)
7.74

Discovery & classification

TNO

Sources