Where is it now
- Distance from Sun
- 4.078 AU
- True anomaly
- 176.79°
- Distance from Earth
- 4.919 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.
In the sky
- Right ascension
- 11h 11m 48s
- Declination
- -13° 03′ 21″
- Constellation
- Crater
- Distance from Earth
- 4.92 AU
- Elongation from the Sun
- 29.59° — 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.
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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
- 2.664 AU
- Eccentricity
- 0.5335
- Inclination
- 26.69°
- Orbital period
- 4.35 years
- Perihelion
- 1.243 AU
- Aphelion
- 4.085 AU
- Longitude of ascending node
- 215.4°
- Argument of periapsis
- 132.51°
- Epoch · J2000
- 2461200.5
- Orbit class · AMO
- Amor
- Earth MOID · 133.1 LD
- 0.342 AU
- Tisserand (Jupiter)
- 3.035
Orbit quality
Orbit very well determined (uncertainty code 0).
- Observations used
- 13,637
- Data arc
- 101.7 years
- First observed
- 23 October 1924
- Last observed
- 30 June 2026
- Residual RMS
- 0.31 ″
- Solution · Otto Matic
- 25 July 2026
Physical properties
- Mean radius
- 19 km
- Rotation period
- 10.3 hours
Visual & observation
- Geometric albedo
- 0.238
- Absolute magnitude (H)
- 9.17
- Colour index (B–V)
- 0.84
- Spectral type (SMASS)
- S
- Spectral type (Tholen)
- S
- Colour index (U–B)
- 0.42
Discovery & classification
- Discovered by
- Baade, W.
- Discovery date
- 23 October 1924
- Discovery site
- Bergedorf
Also known as 1036 · 1924 TD · A924 UB · 1952 BF · 1954 HH
Close approaches 5 on record
| When (UTC) | Body | Distance | Lunar distances | Relative speed |
|---|---|---|---|---|
| 2040-06-30 21:47:00 | Juptr | 1.9576 AU | 761.9 LD | 6.7 km/s |
| 2050-12-07 07:15:00 | Mars | 0.0957 AU | 37.2 LD | 15 km/s |
| 2088-05-12 05:03:00 | Juptr | 1.9598 AU | 762.7 LD | 6.2 km/s |
| 2176-12-16 13:29:00 | Mars | 0.0287 AU | 11.2 LD | 15.7 km/s |
Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.
Sources
- visual properties: JPL SBDB (lookup)
- physical properties: JPL SBDB (lookup)
- physical properties: JPL SBDB (lookup)
- physical properties: JPL SBDB (lookup)
- visual properties: JPL SBDB (lookup)
- visual properties: JPL SBDB (lookup)
- visual properties: JPL SBDB (lookup)
- visual properties: JPL SBDB (lookup)
- visual properties: JPL SBDB (lookup)
- orbital elements: JPL SBDB