4581 Asclepius (1989 FC)

Q: How close will 4581 Asclepius (1989 FC) come to Earth?

The closest recorded approach of 4581 Asclepius (1989 FC) to Earth is 0.4482 AU (67.0 million km) on August 1, 1909, traveling at approximately 23.9 km/s.

Q: How big is 4581 Asclepius (1989 FC)?

Based on NASA estimates, 4581 Asclepius (1989 FC) has an estimated diameter of 0.306 km (189–423 meters range). Its absolute magnitude is H=20.74.

HAZARDOUS

Designation: 4581 · NASA Reference ID: 2004581

View on NASA JPL →

📏

0.306 km (306 meters)

Est. Diameter

✨

H = 20.7

Absolute Magnitude

🌍

0.4482 AU (67.0 million km)

Closest Miss Distance

💨

23.9 km/s

Relative Velocity

Close Approach Data

Date	Miss Distance	Lunar Distance	Speed	Body
June 27, 1901	0.1105 AU (16.5 million km)	43.0 LD	12.6 km/s	Venus
August 1, 1909	0.4482 AU (67.0 million km)	174.3 LD	23.9 km/s	Earth
August 13, 1910	0.1975 AU (29.5 million km)	76.8 LD	16.3 km/s	Earth
August 26, 1911	0.0828 AU (12.4 million km)	32.2 LD	8.7 km/s	Earth
October 18, 1911	0.0516 AU (7.7 million km)	20.1 LD	8.3 km/s	Venus
July 21, 1912	0.2980 AU (44.6 million km)	115.9 LD	7.4 km/s	Earth
October 21, 1912	0.2785 AU (41.7 million km)	108.3 LD	9.7 km/s	Earth
June 21, 1913	0.3822 AU (57.2 million km)	148.7 LD	8.9 km/s	Earth
December 1, 1913	0.3296 AU (49.3 million km)	128.2 LD	12.4 km/s	Earth
May 27, 1914	0.3877 AU (58.0 million km)	150.8 LD	9.1 km/s	Earth
January 8, 1915	0.3033 AU (45.4 million km)	118.0 LD	10.8 km/s	Earth
April 30, 1915	0.3200 AU (47.9 million km)	124.5 LD	8.1 km/s	Earth
March 20, 1916	0.1320 AU (19.8 million km)	51.4 LD	7.1 km/s	Earth
March 28, 1917	0.1364 AU (20.4 million km)	53.1 LD	14.7 km/s	Earth
April 9, 1918	0.4013 AU (60.0 million km)	156.1 LD	22.7 km/s	Earth
March 14, 1922	0.1148 AU (17.2 million km)	44.7 LD	15.2 km/s	Venus
June 21, 1925	0.0921 AU (13.8 million km)	35.8 LD	10.9 km/s	Venus
July 31, 1933	0.4813 AU (72.0 million km)	187.2 LD	24.9 km/s	Earth
August 12, 1934	0.2260 AU (33.8 million km)	87.9 LD	17.1 km/s	Earth
August 25, 1935	0.0642 AU (9.6 million km)	25.0 LD	9.4 km/s	Earth
October 23, 1935	0.0682 AU (10.2 million km)	26.5 LD	8.2 km/s	Venus
July 24, 1936	0.2873 AU (43.0 million km)	111.8 LD	7.2 km/s	Earth
October 18, 1936	0.2704 AU (40.5 million km)	105.2 LD	9.3 km/s	Earth
June 22, 1937	0.3801 AU (56.9 million km)	147.9 LD	8.8 km/s	Earth
November 29, 1937	0.3287 AU (49.2 million km)	127.9 LD	12.4 km/s	Earth
May 29, 1938	0.3899 AU (58.3 million km)	151.7 LD	9.1 km/s	Earth
January 7, 1939	0.3059 AU (45.8 million km)	119.0 LD	11.0 km/s	Earth
May 1, 1939	0.3250 AU (48.6 million km)	126.4 LD	8.2 km/s	Earth
March 20, 1940	0.1393 AU (20.8 million km)	54.2 LD	6.9 km/s	Earth
March 27, 1941	0.1332 AU (19.9 million km)	51.8 LD	14.6 km/s	Earth
April 9, 1942	0.4022 AU (60.2 million km)	156.5 LD	22.7 km/s	Earth
March 17, 1946	0.0400 AU (6.0 million km)	15.6 LD	11.7 km/s	Venus
June 24, 1949	0.1346 AU (20.1 million km)	52.4 LD	14.3 km/s	Venus
July 30, 1957	0.4920 AU (73.6 million km)	191.4 LD	25.2 km/s	Earth
August 12, 1958	0.2397 AU (35.9 million km)	93.2 LD	17.6 km/s	Earth
August 24, 1959	0.0540 AU (8.1 million km)	21.0 LD	9.9 km/s	Earth
October 30, 1959	0.0824 AU (12.3 million km)	32.1 LD	8.2 km/s	Venus
July 27, 1960	0.2746 AU (41.1 million km)	106.8 LD	7.0 km/s	Earth
October 14, 1960	0.2609 AU (39.0 million km)	101.5 LD	8.9 km/s	Earth
June 25, 1961	0.3748 AU (56.1 million km)	145.8 LD	8.8 km/s	Earth
November 25, 1961	0.3269 AU (48.9 million km)	127.2 LD	12.3 km/s	Earth
May 31, 1962	0.3914 AU (58.5 million km)	152.2 LD	9.1 km/s	Earth
January 2, 1963	0.3126 AU (46.8 million km)	121.6 LD	11.3 km/s	Earth
May 5, 1963	0.3363 AU (50.3 million km)	130.8 LD	8.4 km/s	Earth
March 24, 1964	0.1729 AU (25.9 million km)	67.3 LD	6.4 km/s	Earth
March 26, 1965	0.0948 AU (14.2 million km)	36.9 LD	13.5 km/s	Earth
April 7, 1966	0.3626 AU (54.2 million km)	141.0 LD	21.5 km/s	Earth
March 14, 1970	0.0444 AU (6.6 million km)	17.3 LD	11.9 km/s	Venus
June 20, 1973	0.1273 AU (19.0 million km)	49.5 LD	13.8 km/s	Venus
August 9, 1982	0.3060 AU (45.8 million km)	119.0 LD	19.6 km/s	Earth
August 21, 1983	0.0638 AU (9.6 million km)	24.8 LD	11.9 km/s	Earth
October 20, 1983	0.0733 AU (11.0 million km)	28.5 LD	8.2 km/s	Venus
August 13, 1984	0.2203 AU (33.0 million km)	85.7 LD	6.0 km/s	Earth
September 25, 1984	0.2171 AU (32.5 million km)	84.5 LD	6.9 km/s	Earth
July 4, 1985	0.3544 AU (53.0 million km)	137.9 LD	8.4 km/s	Earth
November 14, 1985	0.3168 AU (47.4 million km)	123.2 LD	11.7 km/s	Earth
June 8, 1986	0.3927 AU (58.8 million km)	152.8 LD	9.1 km/s	Earth
December 21, 1986	0.3258 AU (48.7 million km)	126.7 LD	12.1 km/s	Earth
May 15, 1987	0.3628 AU (54.3 million km)	141.1 LD	8.7 km/s	Earth
February 3, 1988	0.2523 AU (37.7 million km)	98.1 LD	8.0 km/s	Earth
April 12, 1988	0.2484 AU (37.2 million km)	96.6 LD	7.1 km/s	Earth
March 22, 1989	0.0046 AU (684,008 km)	1.8 LD	10.7 km/s	Earth
March 23, 1989	0.0045 AU (680,257 km)	1.8 LD	11.0 km/s	Moon
March 31, 1990	0.2075 AU (31.0 million km)	80.7 LD	16.9 km/s	Earth
April 10, 1991	0.4150 AU (62.1 million km)	161.4 LD	23.1 km/s	Earth
May 3, 2000	0.0575 AU (8.6 million km)	22.4 LD	12.6 km/s	Venus
June 28, 2003	0.0766 AU (11.5 million km)	29.8 LD	8.3 km/s	Venus
September 5, 2006	0.0897 AU (13.4 million km)	34.9 LD	10.9 km/s	Venus
August 7, 2011	0.3054 AU (45.7 million km)	118.8 LD	19.5 km/s	Earth
August 16, 2012	0.1079 AU (16.1 million km)	42.0 LD	13.5 km/s	Earth
August 25, 2013	0.1188 AU (17.8 million km)	46.2 LD	7.6 km/s	Earth
July 22, 2014	0.2859 AU (42.8 million km)	111.2 LD	7.3 km/s	Earth
October 17, 2014	0.2733 AU (40.9 million km)	106.3 LD	9.4 km/s	Earth
June 27, 2015	0.3623 AU (54.2 million km)	140.9 LD	8.6 km/s	Earth
November 19, 2015	0.3265 AU (48.8 million km)	127.0 LD	12.2 km/s	Earth
June 6, 2016	0.3854 AU (57.7 million km)	149.9 LD	9.1 km/s	Earth
December 17, 2016	0.3312 AU (49.5 million km)	128.8 LD	12.4 km/s	Earth
May 17, 2017	0.3644 AU (54.5 million km)	141.8 LD	8.8 km/s	Earth
January 18, 2018	0.2890 AU (43.2 million km)	112.4 LD	9.9 km/s	Earth
April 24, 2018	0.2930 AU (43.8 million km)	114.0 LD	7.8 km/s	Earth
March 22, 2019	0.1381 AU (20.7 million km)	53.7 LD	7.0 km/s	Earth
March 25, 2020	0.0705 AU (10.5 million km)	27.4 LD	12.8 km/s	Earth
April 3, 2021	0.2810 AU (42.0 million km)	109.3 LD	19.0 km/s	Earth
April 13, 2022	0.4865 AU (72.8 million km)	189.2 LD	25.3 km/s	Earth
March 8, 2026	0.0291 AU (4.4 million km)	11.3 LD	11.3 km/s	Venus
May 2, 2029	0.0807 AU (12.1 million km)	31.4 LD	8.3 km/s	Venus
July 6, 2032	0.0864 AU (12.9 million km)	33.6 LD	10.4 km/s	Venus
August 6, 2042	0.3278 AU (49.0 million km)	127.5 LD	20.2 km/s	Earth
August 16, 2043	0.1335 AU (20.0 million km)	51.9 LD	14.3 km/s	Earth
August 24, 2044	0.0891 AU (13.3 million km)	34.7 LD	8.5 km/s	Earth
July 28, 2045	0.2638 AU (39.5 million km)	102.6 LD	6.9 km/s	Earth
October 9, 2045	0.2559 AU (38.3 million km)	99.5 LD	8.5 km/s	Earth
July 1, 2046	0.3514 AU (52.6 million km)	136.7 LD	8.5 km/s	Earth
November 13, 2046	0.3202 AU (47.9 million km)	124.6 LD	11.8 km/s	Earth
June 11, 2047	0.3835 AU (57.4 million km)	149.2 LD	9.0 km/s	Earth
December 12, 2047	0.3338 AU (49.9 million km)	129.9 LD	12.5 km/s	Earth
May 22, 2048	0.3724 AU (55.7 million km)	144.9 LD	8.9 km/s	Earth
January 10, 2049	0.3044 AU (45.5 million km)	118.4 LD	10.8 km/s	Earth
May 1, 2049	0.3155 AU (47.2 million km)	122.7 LD	8.2 km/s	Earth
March 30, 2050	0.1898 AU (28.4 million km)	73.8 LD	6.5 km/s	Earth
March 24, 2051	0.0123 AU (1.8 million km)	4.8 LD	11.0 km/s	Earth
January 1, 2052	0.1418 AU (21.2 million km)	55.1 LD	16.5 km/s	Venus
April 2, 2052	0.2414 AU (36.1 million km)	93.9 LD	17.9 km/s	Earth
April 12, 2053	0.4641 AU (69.4 million km)	180.5 LD	24.6 km/s	Earth
March 4, 2055	0.0786 AU (11.8 million km)	30.6 LD	8.2 km/s	Venus
July 30, 2070	0.4970 AU (74.3 million km)	193.3 LD	25.4 km/s	Earth
August 10, 2071	0.2777 AU (41.5 million km)	108.0 LD	18.7 km/s	Earth
September 22, 2071	0.0186 AU (2.8 million km)	7.2 LD	9.3 km/s	Venus
August 20, 2072	0.0567 AU (8.5 million km)	22.1 LD	11.6 km/s	Earth
August 16, 2073	0.2089 AU (31.3 million km)	81.3 LD	5.9 km/s	Earth
September 19, 2073	0.2083 AU (31.2 million km)	81.0 LD	6.4 km/s	Earth
July 7, 2074	0.3420 AU (51.2 million km)	133.0 LD	8.2 km/s	Earth
November 8, 2074	0.3116 AU (46.6 million km)	121.2 LD	11.4 km/s	Earth
December 22, 2074	0.1162 AU (17.4 million km)	45.2 LD	13.3 km/s	Venus
June 13, 2075	0.3885 AU (58.1 million km)	151.1 LD	9.1 km/s	Earth
December 12, 2075	0.3317 AU (49.6 million km)	129.0 LD	12.5 km/s	Earth
May 21, 2076	0.3751 AU (56.1 million km)	145.9 LD	8.9 km/s	Earth
January 17, 2077	0.2893 AU (43.3 million km)	112.5 LD	10.0 km/s	Earth
April 25, 2077	0.2967 AU (44.4 million km)	115.4 LD	7.8 km/s	Earth
March 20, 2078	0.1085 AU (16.2 million km)	42.2 LD	7.7 km/s	Earth
March 29, 2079	0.1342 AU (20.1 million km)	52.2 LD	14.7 km/s	Earth
April 8, 2080	0.3744 AU (56.0 million km)	145.6 LD	21.9 km/s	Earth
May 30, 2088	0.0853 AU (12.8 million km)	33.2 LD	8.2 km/s	Venus
August 3, 2097	0.4041 AU (60.5 million km)	157.2 LD	22.6 km/s	Earth
August 14, 2098	0.1722 AU (25.8 million km)	67.0 LD	15.5 km/s	Earth
August 25, 2099	0.0857 AU (12.8 million km)	33.3 LD	8.6 km/s	Earth
July 24, 2100	0.2861 AU (42.8 million km)	111.3 LD	7.3 km/s	Earth
October 18, 2100	0.2719 AU (40.7 million km)	105.8 LD	9.3 km/s	Earth
June 26, 2101	0.3723 AU (55.7 million km)	144.8 LD	8.8 km/s	Earth
November 7, 2101	0.0414 AU (6.2 million km)	16.1 LD	11.9 km/s	Venus
November 25, 2101	0.3288 AU (49.2 million km)	127.9 LD	12.3 km/s	Earth
June 4, 2102	0.3883 AU (58.1 million km)	151.1 LD	9.1 km/s	Earth
December 28, 2102	0.3220 AU (48.2 million km)	125.3 LD	11.9 km/s	Earth
May 12, 2103	0.3494 AU (52.3 million km)	135.9 LD	8.6 km/s	Earth
February 8, 2104	0.2441 AU (36.5 million km)	95.0 LD	7.6 km/s	Earth
April 11, 2104	0.2376 AU (35.5 million km)	92.4 LD	6.9 km/s	Earth
February 5, 2105	0.0822 AU (12.3 million km)	32.0 LD	9.1 km/s	Venus
March 23, 2105	0.0172 AU (2.6 million km)	6.7 LD	10.3 km/s	Earth
April 1, 2106	0.2037 AU (30.5 million km)	79.3 LD	16.7 km/s	Earth
April 12, 2107	0.4203 AU (62.9 million km)	163.5 LD	23.3 km/s	Earth
July 16, 2121	0.0347 AU (5.2 million km)	13.5 LD	11.6 km/s	Venus
September 21, 2124	0.0886 AU (13.2 million km)	34.4 LD	8.2 km/s	Venus
August 8, 2126	0.3120 AU (46.7 million km)	121.4 LD	19.8 km/s	Earth
August 18, 2127	0.1117 AU (16.7 million km)	43.5 LD	13.6 km/s	Earth
November 21, 2127	0.1378 AU (20.6 million km)	53.6 LD	14.8 km/s	Venus
August 26, 2128	0.1167 AU (17.5 million km)	45.4 LD	7.6 km/s	Earth
July 23, 2129	0.2873 AU (43.0 million km)	111.8 LD	7.3 km/s	Earth
October 19, 2129	0.2743 AU (41.0 million km)	106.7 LD	9.4 km/s	Earth
June 28, 2130	0.3641 AU (54.5 million km)	141.6 LD	8.7 km/s	Earth
November 22, 2130	0.3272 AU (48.9 million km)	127.3 LD	12.2 km/s	Earth
June 7, 2131	0.3862 AU (57.8 million km)	150.2 LD	9.1 km/s	Earth
December 21, 2131	0.3296 AU (49.3 million km)	128.2 LD	12.3 km/s	Earth
May 17, 2132	0.3618 AU (54.1 million km)	140.8 LD	8.8 km/s	Earth
January 23, 2133	0.2812 AU (42.1 million km)	109.4 LD	9.5 km/s	Earth
April 23, 2133	0.2834 AU (42.4 million km)	110.3 LD	7.6 km/s	Earth
March 22, 2134	0.1136 AU (17.0 million km)	44.2 LD	7.5 km/s	Earth
March 29, 2135	0.0998 AU (14.9 million km)	38.8 LD	13.6 km/s	Earth
April 6, 2136	0.3128 AU (46.8 million km)	121.7 LD	20.0 km/s	Earth
April 17, 2144	0.0612 AU (9.2 million km)	23.8 LD	12.8 km/s	Venus
June 15, 2147	0.0805 AU (12.0 million km)	31.3 LD	8.3 km/s	Venus
August 23, 2150	0.1004 AU (15.0 million km)	39.0 LD	12.1 km/s	Venus
August 7, 2156	0.3412 AU (51.0 million km)	132.7 LD	20.6 km/s	Earth
August 16, 2157	0.1381 AU (20.7 million km)	53.7 LD	14.5 km/s	Earth
August 26, 2158	0.0912 AU (13.6 million km)	35.5 LD	8.4 km/s	Earth
July 28, 2159	0.2714 AU (40.6 million km)	105.6 LD	7.0 km/s	Earth
October 14, 2159	0.2620 AU (39.2 million km)	101.9 LD	8.8 km/s	Earth
June 30, 2160	0.3577 AU (53.5 million km)	139.1 LD	8.6 km/s	Earth
November 17, 2160	0.3235 AU (48.4 million km)	125.9 LD	12.0 km/s	Earth
June 10, 2161	0.3860 AU (57.7 million km)	150.1 LD	9.1 km/s	Earth
December 17, 2161	0.3318 AU (49.6 million km)	129.1 LD	12.4 km/s	Earth
May 21, 2162	0.3677 AU (55.0 million km)	143.0 LD	8.9 km/s	Earth
January 18, 2163	0.2912 AU (43.6 million km)	113.3 LD	10.1 km/s	Earth
April 27, 2163	0.2975 AU (44.5 million km)	115.7 LD	7.9 km/s	Earth
March 23, 2164	0.1416 AU (21.2 million km)	55.1 LD	6.9 km/s	Earth
March 27, 2165	0.0711 AU (10.6 million km)	27.7 LD	12.8 km/s	Earth
April 6, 2166	0.2858 AU (42.8 million km)	111.2 LD	19.2 km/s	Earth
January 18, 2167	0.1237 AU (18.5 million km)	48.1 LD	15.7 km/s	Venus
April 15, 2167	0.4948 AU (74.0 million km)	192.5 LD	25.6 km/s	Earth
May 27, 2173	0.0937 AU (14.0 million km)	36.4 LD	11.5 km/s	Venus
August 1, 2185	0.4647 AU (69.5 million km)	180.8 LD	24.4 km/s	Earth
August 11, 2186	0.2558 AU (38.3 million km)	99.5 LD	18.1 km/s	Earth
August 21, 2187	0.0585 AU (8.8 million km)	22.8 LD	11.8 km/s	Earth
August 26, 2188	0.1814 AU (27.1 million km)	70.6 LD	5.9 km/s	Earth
July 14, 2189	0.3203 AU (47.9 million km)	124.6 LD	7.9 km/s	Earth
October 28, 2189	0.0386 AU (5.8 million km)	15.0 LD	11.8 km/s	Venus
October 31, 2189	0.2989 AU (44.7 million km)	116.3 LD	10.6 km/s	Earth
June 22, 2190	0.3747 AU (56.1 million km)	145.8 LD	8.9 km/s	Earth
December 1, 2190	0.3328 AU (49.8 million km)	129.4 LD	12.5 km/s	Earth
June 2, 2191	0.3828 AU (57.3 million km)	148.9 LD	9.1 km/s	Earth
December 30, 2191	0.3228 AU (48.3 million km)	125.6 LD	11.9 km/s	Earth
May 12, 2192	0.3471 AU (51.9 million km)	135.0 LD	8.6 km/s	Earth
December 29, 2192	0.0864 AU (12.9 million km)	33.6 LD	8.2 km/s	Venus
February 2, 2193	0.2600 AU (38.9 million km)	101.1 LD	8.4 km/s	Earth
April 17, 2193	0.2559 AU (38.3 million km)	99.5 LD	7.2 km/s	Earth
March 23, 2194	0.0736 AU (11.0 million km)	28.6 LD	8.6 km/s	Earth
March 30, 2195	0.1312 AU (19.6 million km)	51.0 LD	14.5 km/s	Earth
March 2, 2196	0.1046 AU (15.7 million km)	40.7 LD	12.5 km/s	Venus
April 7, 2196	0.3340 AU (50.0 million km)	129.9 LD	20.7 km/s	Earth

⚠️

Potentially Hazardous Asteroid

4581 Asclepius (1989 FC) is classified as a Potentially Hazardous Asteroid (PHA) because it is estimated to be larger than 140 meters and its orbit comes within 0.05 AU of Earth. NASA continuously monitors this object for any future impact risk. Current data does not indicate a confirmed impact event.

Sub-kilometer-sized asteroid

4581 Asclepius, provisional designation 1989 FC, is a sub-kilometer-sized asteroid, classified as near-Earth object and potentially hazardous asteroid of the Apollo group that makes close orbital passes with Earth. Discovered on 31 March 1989 by American astronomers Henry Holt and Norman Thomas at Palomar Observatory, Asclepius is named after the Greek god of medicine and healing.

Wikipedia WikidataSource: Wikipedia (CC BY-SA)

Frequently Asked Questions

Is 4581 Asclepius (1989 FC) dangerous?▾

4581 Asclepius (1989 FC) is classified as a potentially hazardous asteroid (PHA) by NASA. This means it is large enough and its orbit brings it close enough to Earth to warrant close monitoring. However, a PHA classification does not mean an impact is imminent.

How close will 4581 Asclepius (1989 FC) come to Earth?▾

The closest recorded Earth approach of 4581 Asclepius (1989 FC) is 0.4482 AU (67.0 million km) on August 1, 1909, at a speed of approximately 23.9 km/s.

How big is 4581 Asclepius (1989 FC)?▾

4581 Asclepius (1989 FC) has an estimated diameter of 0.306 km (189–423 meters range). Its absolute magnitude (H) is 20.74, which NASA uses along with assumed albedo to estimate size.