(7482) 1994 PC1

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(7482) 1994 PC1
1994 PC1 orbit 2022.png
Orbit and positions on January 1, 2019
Discovery [1]
Discovered by R. H. McNaught
Discovery site Siding Spring Obs.
Discovery date 9 August 1994
Designations
MPC designation (7482) 1994 PC1
1994 PC1
Apollo · NEO · PHA
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 41.97 yr (15,331 days)
Aphelion 1.7882 AU
Perihelion 0.9042 AU
1.3462 AU
Eccentricity 0.3283
1.56 yr (571 days)
47.475°
0° 37m 51.6s / day
Inclination 33.487°
117.89°
47.625°
Earth MOID 0.0010 AU · 0.4 LD
Physical characteristics
Dimensions 1.052±0.303 km[2][2]
1.30 km (calculated)[3]
2.5999 h[4]
0.20 (assumed)[3]
0.277±0.185[2][2]
SMASS = S[1][3]
16.8[1][3] · 16.80±0.3[2]

(7482) 1994 PC1 is a stony asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 1.1 kilometers in diameter. It was discovered on 9 August 1994, by astronomer Robert McNaught at the Siding Spring Observatory in Coonabarabran, Australia.[5]

Orbit and classification[edit]

1994 PC1 orbits the Sun at a distance of 0.9–1.8 AU once every 1 years and 7 months (571 days). Its orbit has an eccentricity of 0.33 and an inclination of 33° with respect to the ecliptic.[1]

On 17 January 1933, it passed 0.00752 AU (1,125,000 km; 699,000 mi) from Earth.[6] On 18 January 2022, it will pass 0.01324 AU (1,981,000 km; 1,231,000 mi) from Earth.[6]

Physical characteristics[edit]

In the SMASS classification, 1994 PC1 is a common stony S-type asteroid.[1][3]

Rotation period[edit]

In 1998, a rotational lightcurve of 1994 PC1 was obtained from photometric observations by Petr Pravec. Lightcurve analysis gave a well-defined rotation period of 2.5999 hours with a brightness amplitude of 0.29 magnitude (U=3).[4]

Diameter and albedo[edit]

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, 1994 PC1 measures 1.052 kilometers in diameter and its surface has an albedoof 0.277.[2]

The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.20 and calculates a diameter of 1.30 kilometers based on an absolute magnitude of 16.8.[3] With an absolute magnitude (H) of 16.8,[1] 1994 PC1 is estimated to be 1–2.5 km in diameter.[7]

2022 flyby[edit]

On January 19, 2022, (7482) 1994 PC1 will pass just outside of 3 lunar distances of the earth, with a peak magnitude of 7-8.

Sky trajectory with hourly motion
1994 PC1 skypath 2022.png

Naming[edit]

As of 2017, this minor planet has not been named. [5]

References[edit]

  1. ^ a b c d e f g "JPL Small-Body Database Browser: 7482 (1994 PC1)" (2016-09-12 last obs.). Jet Propulsion Laboratory. Retrieved 2 November 2017. 
  2. ^ a b c d e f Mainzer, A.; Grav, T.; Masiero, J.; Bauer, J.; Cutri, R. M.; McMillan, R. S.; et al. (November 2012). "Physical Parameters of Asteroids Estimated from the WISE 3-Band Data and NEOWISE Post-Cryogenic Survey". The Astrophysical Journal Letters. 760 (1): 6. Bibcode:2012ApJ...760L..12M. doi:10.1088/2041-8205/760/1/L12. Retrieved 2 November 2017. 
  3. ^ a b c d e f "LCDB Data for (7482)". Asteroid Lightcurve Database (LCDB). Retrieved 2 November 2017. 
  4. ^ a b Pravec, Petr; Wolf, Marek; Sarounová, Lenka (November 1998). "Lightcurves of 26 Near-Earth Asteroids". Icarus. 136 (1): 124–153. Bibcode:1998Icar..136..124P. doi:10.1006/icar.1998.5993. Retrieved 2 November 2017. 
  5. ^ a b "7482 (1994 PC1)". Minor Planet Center. Retrieved 2 November 2017. 
  6. ^ a b "JPL Close-Approach Data: 7482 (1994 PC1)". Retrieved 2014-03-02. 2013-08-27 last obs (arc=38.9 yr) 
  7. ^ "Absolute Magnitude (H)". NASA/JPL. Retrieved 2014-03-02. 

External links[edit]