52°37′15″N 12°45′40″E / 52.62083°N 12.76111°E
![]() A fragment of 2024 BX1 | |
Discovery[1][2] | |
---|---|
Discovered by | Krisztián Sárneczky |
Discovery site | Piszkéstető Stn. |
Discovery date | 20 January 2024 |
Designations | |
2024 BX1 | |
Sar2736, Ribbeck | |
NEO · Apollo | |
Orbital characteristics[3] | |
Epoch 13 September 2023 (JD 2460200.5) | |
Uncertainty parameter 6 | |
Observation arc | 2.49 h (150 min) |
Aphelion | 1.833 AU |
Perihelion | 0.835 AU |
1.334 AU | |
Eccentricity | 0.3740 |
1.54 yr (563.0 d) | |
246.680° | |
0° 38m 22.038s / day | |
Inclination | 7.266° |
300.141° | |
243.604° | |
Earth MOID | 0.000532 AU (79,600 km) |
Physical characteristics | |
44 cm[4] 40–60 cm[5] | |
Mass | 140 kg (entry mass)[4] 1.8 kg (recovered)[5] |
2.5888±0.0002 s[6] | |
E-type asteroid[4] | |
32.795±0.353[3] 32.84[1] –14.4 (bolide maximum)[4] | |
2024 BX1, previously known under its temporary designation Sar2736, was a 44 centimetre-sized (17 inches)[4] asteroid or meteoroid that entered Earth's atmosphere on 21 January 2024 00:33 UTC and disintegrated as a meteor over Berlin.[2][7] It was discovered less than three hours before impact by Hungarian astronomer Krisztián Sárneczky at Konkoly Observatory's Piszkéstető Station in the Mátra Mountains, Hungary.[2] It was observed with the 60 cm Schmidt Telescope. Sárneczky first thought it was a known asteroid because it had a brightness of 18th magnitude, but he could not find it in any catalog, so he reported it to the Minor Planet Center.[8] The fireball was observed by the cameras of the AllSky7[9] and Fripon[10] networks. 2024 BX1 is the eighth asteroid discovered before impacting Earth, and is Sárneczky's third discovery of an impacting asteroid. Before it impacted, 2024 BX1 was a near-Earth asteroid on an Earth-crossing Apollo-type orbit.
The bolide was studied in June 2024. It had a steep entry of 75.6° and an entry speed of 15.20 km/s. The bolide was observed with the SDAFO at Tautenburg, which took a spectrum of the bolide. The spectrum was low in iron, consistent with an enstatite-rich body (E-type asteroid). At a hight of 55 km the meteoroid fragmented into smaller pieces. These primary pieces then broke up again at a height of 39-29 km. The size and mass were first estimated at 1 meter and 1700 kg based on albedos of S-type asteroids. The radiometric measurements from the European Fireball Network did however suggest a mass of about 100 kg. Considering it was an E-type asteroid, which have higher albedos, the new estimates are 0.44 meters and 140 kg.[4]
MPC-object
was invoked but never defined (see the help page).MPEC-2024-B76
was invoked but never defined (see the help page).jpldata
was invoked but never defined (see the help page).Spurný2024
was invoked but never defined (see the help page).Bischoff2024
was invoked but never defined (see the help page).Devogèle2024
was invoked but never defined (see the help page).NYT-20240210
was invoked but never defined (see the help page).Konkoly2024
was invoked but never defined (see the help page).allsky7
was invoked but never defined (see the help page).fripon
was invoked but never defined (see the help page).