(7335) 1989 JA

(7335) 1989 JA
Radar images of 1989 JA and its satellite, imaged by the Goldstone observatory in May 2022
Discovery[1]
Discovered byE. F. Helin
Discovery sitePalomar Obs.
Discovery date1 May 1989
Designations
(7335) 1989 JA
1989 JA
Apollo · NEO · PHA[1]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc27.98 yr (10,221 days)
Aphelion2.6277 AU
Perihelion0.9136 AU
1.7706 AU
Eccentricity0.4840
2.36 yr (861 days)
341.87°
0° 25m 5.88s / day
Inclination15.196°
61.325°
232.24°
Earth MOID0.0225 AU · 8.8 LD
Physical characteristics
Dimensions0.932±0.153 km[2]
1.18 km (calculated)[3]
1.8 km (outdated)[1]
<12 h[4]
0.20 (assumed)[3]
0.31±0.30[3][5]
0.322±0.150[2][6]
S[3]
17.0[1][2][3] · 17.8±0.3[7]

(7335) 1989 JA (provisional designation 1989 JA) is a stony asteroid of the Apollo group, classified as near-Earth object and potentially hazardous asteroid, approximately 1 kilometer in diameter. It was discovered on 1 May 1989, by American astronomer Eleanor Helin at the U.S. Palomar Observatory in California.[8] On 27 May 2022, the asteroid made a close approach 0.027 astronomical units (4.0×10^6 km; 2.5×10^6 mi) from Earth. During the close approach, optical observations detected signs of an orbiting satellite, which was later confirmed by radar imaging at NASA's Goldstone Solar System Radar in California.[9]

2022 close approach[1]
Date JPL SBDB
nominal geocentric
distance 		uncertainty
region
(3-sigma)
2022-05-27 4024703 km ± 153 km
  1. ^ a b c d e f Cite error: The named reference jpldata was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference WISE was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference lcdb was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Mahapatra-2002 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Mainzer-2011 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Mainzer-2011b was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Wisniewski-1997 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference MPC-7335 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Goldstone was invoked but never defined (see the help page).