Asteroids

437844 1999MN help

Last update: 2024-04-19 22:30 UTC

Orbital Properties

Epoch

60400.0

MJD

Orbit type

Aten

Perihelion (q)

0.226

Aphelion (Q)

1.122

Eccentricity (e)

0.665

Inclination (i)

2.0

deg

Orbit period (P)

202.1

Earth MOID

0.00597

U parameter

1.4

A₂

34.9

10^-15au/days²

Next Earth close approach

Date

2025-07-05

Nominal distance (from Earth center)

0.0714

10681676

Maximum Brightness

16.8

mag

Risk

Object is not in risk list

Object is not in priority list

Physical Properties

Absolute Magnitude (H)

21.2

mag

Diameter

150 - 300*

Taxonomic type

Rotation period (T)

5.494

Discovery Information

Discovery Date

1999-06-22

Observatory

Catalina Sky Survey

Orbit Visualiser

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External links

Proper elements

Epoch

Near present day

Near middle of observation arc

Orbit properties

Epoch
Semimajor Axis
Eccentricity (e)
Inclination (i)
Long. of Ascending Node (Ω)
Arg. of Perihelion (ω)
Mean Anomaly (M)
Perihelion distance
Aphelion distance
Asc. Node-Earth Sep.
Desc. Node-Earth Sep.
MOID
Orbit Period
U parameter

Value

1-sigma variation

Unit

Epoch

Value

60400.0000

1-sigma variation

Unit

MJD

Semimajor Axis

Value

0.674002

1-sigma variation

8.428E-9

Unit

Eccentricity (e)

Value

0.665351

1-sigma variation

6.333E-8

Unit

Inclination (i)

Value

2.0350

1-sigma variation

6.420E-6

Unit

Long. of Ascending Node (Ω)

Value

81.4212

1-sigma variation

3.523E-5

Unit

Arg. of Perihelion (ω)

Value

9.1785

1-sigma variation

3.600E-5

Unit

Mean Anomaly (M)

Value

118.78064

1-sigma variation

0.00005

Unit

Perihelion distance

Value

0.225554

1-sigma variation

Unit

Aphelion distance

Value

1.122450

1-sigma variation

Unit

Asc. Node-Earth Sep.

Value

-0.756956

1-sigma variation

Unit

Desc. Node-Earth Sep.

Value

0.078325

1-sigma variation

Unit

MOID

Value

0.005967

1-sigma variation

Unit

Orbit Period

Value

202.1111

1-sigma variation

Unit

U parameter

Value

1.4

1-sigma variation

Unit

A₂

Value

34.85928

1-sigma variation

3.20148

Unit

10^-15au/days²

Covariance Matrix

	a	e	i	Ω	ω	M	A₂
a	7.10382E-17	-2.29707E-16	8.02106E-16	-3.57391E-14	4.28644E-14	-4.47622E-13	2.34082E-8
e	-2.29707E-16	4.01071E-15	4.01802E-14	1.07266E-13	-1.04026E-13	1.37456E-12	-1.48484E-7
i	8.02106E-16	4.01802E-14	4.12178E-11	5.56034E-11	-5.55691E-11	5.18075E-12	-4.22300E-6
Ω	-3.57391E-14	1.07266E-13	5.56034E-11	1.24081E-9	-1.26085E-9	2.81806E-10	-9.87881E-6
ω	4.28644E-14	-1.04026E-13	-5.55691E-11	-1.26085E-9	1.29606E-9	-3.58257E-10	9.91606E-6
M	-4.47622E-13	1.37456E-12	5.18075E-12	2.81806E-10	-3.58257E-10	2.90397E-9	-1.41122E-4
A₂	2.34082E-8	-1.48484E-7	-4.22300E-6	-9.87881E-6	9.91606E-6	-1.41122E-4	1.02495E1

Date of computation: 2024-02-21 14:29 UTC

Note: The ASCII file is in a format suitable for Orbfit input.

Download ASCII file:

Physical properties

Rotation Period
Quality
Amplitude
Rotation Direction
Spinvector L
Spinvector B

Rotational properties

Value

Unit

Source

Rotation Period

Value

5.494

5.495

Unit

Source

[5]

[6]

Quality

Value

Unit

Source

[5]

[6]

Amplitude

Value

0.6-0.77

Unit

mag

Source

[5]

Rotation Direction

Value

Unit

Source

[-]

Spinvector L

Value

Unit

Source

[-]

Spinvector B

Value

Unit

Source

[-]

Taxonomy
Taxonomy (all)

Taxonomy

Value

Unit

Source

Taxonomy

Value

Unit

Source

[1]

[2]

Taxonomy (all)

Value

Unit

Source

[3]

[4]

Absolute Magnitude (H)
Slope Parameter (G)

H / G

Value

Unit

Source

Absolute Magnitude (H)

Value

21.172

20.57

Unit

mag

Source

[7]

[2]

Slope Parameter (G)

Value

0.15**

0.32

Unit

mag

Source

[7]

[2]

Albedo
Diameter

Size and albedo

Value

Unit

Source

Albedo

Value

0.05 - 0.25

Unit

Source

[8]

Diameter

Value

150 - 300*

Unit

Source

[8]

Color Index Information

Color Index Information

Value

Unit

Source

Color Index Information

Value

0.77

0.43

Unit

B-V

V-R

Source

[2]

Sightings

Sightings

Value

Unit

Source

Sightings

Value

Radar R

Unit

Source

[9]

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Sources

No.	Name	Additional
[1]	EARN	1.) Michaël Marsset et al 2022 AJ 163 165
[2]	EARN	1.) Hicks, M. et al. (2010) href="http://www.astronomerstelegram.org/?read=2706"> ATel#2706 (Broadband Photometry of the Potentially Hazardous Asteroid 1999 MN: Suggestive of YORP and/or Tidal Spin-Up?)
[3]	EARN	Earth Asteroids Research Node: https://earn.dlr.de
[4]	EARN	1.) Hicks, M. et al. (2010) href="http://www.astronomerstelegram.org/?read=2706"> ATel#2706 (Broadband Photometry of the Potentially Hazardous Asteroid 1999 MN: Suggestive of YORP and/or Tidal Spin-Up?) 2.) Somers, J.M. et al. (2010) DPS 42, 1316. (abstract) (Optical Characterization Of Planetary Radar Targets, Low-deltaV, And Potentially Hazardous Asteroids: Results From 2009-2010)
[5]	EARN	1.) Hergenrother, C.W. & R.J. Whiteley (2011) Icarus 214, 194-209. (A survey of small fast rotating asteroids among the near-Earth asteroid population) (new data for 53 NEAs) 2.) Hicks, M. et al. (2010) href="http://www.astronomerstelegram.org/?read=2706"> ATel#2706 (Broadband Photometry of the Potentially Hazardous Asteroid 1999 MN: Suggestive of YORP and/or Tidal Spin-Up?) 3.) Hergenrother, C.W. & R.J. Whiteley (2005) B.A.A.S. 37, 636-637. (The Rotation State of Small Rapidly Rotating Asteroids)
[6]	EARN	1.) Hergenrother, C.W. & R.J. Whiteley (2005) B.A.A.S. 37, 636-637. (The Rotation State of Small Rapidly Rotating Asteroids)
[7]	ESA ODIM	ESA orbit determination and impact monitoring system
[8]	Estimation	Estimated from absolute magnitude
[9]	EARN	1.) href="http://echo.jpl.nasa.gov/asteroids/index.html">JPL's NEO Radar Detection Program Webpage

Observational Information

Arc Length
Unobserved
Normalized RMS of residuals

Arc Information

Value

Unit

Source

Arc Length

Value

7690

Unit

Source

[1]

Unobserved

Value

1379

Unit

Source

[1]

Normalized RMS of residuals

Value

0.633023

Unit

Source

[1]

Astrometry Summary

First Observation
Last Observation
Total Optical Observations (Discarded)

Optical

Value

Unit

Source

First Observation

Value

1999-06-22.35417

Unit

Source

[2]

Last Observation

Value

2020-07-11.205918

Unit

Source

[2]

Total Optical Observations (Discarded)

Value

169 (4)

Unit

Source

[1]

Radar Summary

First Observation
Last Observation
Delay (Discarded)
Doppler (Discarded)
Total Optical Observations (Discarded)

Radar

Value

Unit

Source

First Observation

Value

Unit

Source

[3]

Last Observation

Value

Unit

Source

[3]

Delay (Discarded)

Value

0 (0)

Unit

Source

[1]

Doppler (Discarded)

Value

0 (0)

Unit

Source

[1]

Total Radar Observations (Discarded)

Value

0 (0)

Unit

Source

[1]

Note: The ASCII file is in a format suitable for Orbfit input.

Sources

No.	Name	Additional
[1]	ESA ODIM	ESA orbit determination and impact monitoring system
[2]	MPC	Minor Planet Center: https://www.minorplanetcenter.net
[3]	JPL Radar Observations	Jet Propulsion Laboratory: https://ssd.jpl.nasa.gov/dat/radar_data_ast.txt

Computation parameters

As seen from:

Initial Date: *

Final Date: *

Output option:

One line per time step

Time step:*

* - these fields are required

Close approaches for 437844 1999MN from 1950 to 2124

Body	Date in UTC	Time uncert. in min	Nominal distance in au	Min. possibile distance in au	Distance uncert. in au
EARTH	1952-07-10 05:59	3.0	0.1748807	0.1746465	0.0000781
EARTH	1953-06-08 12:53	9.0	0.0739077	0.0737938	0.0000380
MERCURY	1958-03-08 09:12	< 1 min	0.0309230	0.0308943	0.0000096
EARTH	1958-06-14 16:33	< 1 min	0.0977568	0.0977468	0.0000033
VENUS	1958-11-09 10:49	< 1 min	0.0376598	0.0376542	0.0000018
EARTH	1963-06-22 15:03	10.5	0.1069766	0.1069673	0.0000031
MERCURY	1963-09-21 22:54	8.7	0.0251317	0.0247924	0.0001135
VENUS	1964-05-24 03:27	2.7	0.0172454	0.0169879	0.0000859
EARTH	1968-07-01 02:54	8.5	0.0906432	0.0905846	0.0000195
VENUS	1969-12-06 08:11	1.7	0.0217932	0.0216232	0.0000567
EARTH	1973-07-09 05:42	< 1 min	0.0401057	0.0401040	0.0000006
EARTH	1974-06-01 21:58	< 1 min	0.1100194	0.1099869	0.0000108
VENUS	1975-06-20 07:22	< 1 min	0.0390085	0.0389052	0.0000344
EARTH	1978-07-12 11:38	< 1 min	0.0446730	0.0445251	0.0000493
EARTH	1979-06-02 04:43	1.8	0.0197897	0.0196165	0.0000578
MERCURY	1982-08-08 21:00	8.4	0.0300357	0.0297447	0.0000973
EARTH	1983-07-12 03:09	1.8	0.1294977	0.1293143	0.0000611
EARTH	1984-06-05 07:50	5.9	0.0501547	0.0500352	0.0000398
MERCURY	1988-02-19 10:32	8.2	0.0333117	0.0331016	0.0000701
EARTH	1989-06-14 15:13	6.2	0.0970049	0.0969709	0.0000113
MERCURY	1989-09-26 17:45	6.0	0.0153435	0.0152867	0.0000195
EARTH	1994-06-26 10:37	4.3	0.1031010	0.1030904	0.0000035
EARTH	1999-07-07 00:23	1.6	0.0647214	0.0646994	0.0000073
EARTH	2000-06-02 08:20	< 1 min	0.1494775	0.1494411	0.0000121
MERCURY	2003-01-28 14:27	< 1 min	0.0363344	0.0363003	0.0000114
EARTH	2004-07-11 12:14	< 1 min	0.0193395	0.0193343	0.0000018
EARTH	2005-06-01 10:17	< 1 s	0.0517380	0.0517275	0.0000035
MERCURY	2008-08-09 17:33	< 1 min	0.0345490	0.0345442	0.0000016
EARTH	2009-07-12 04:13	< 1 s	0.1036188	0.1036175	0.0000004
MERCURY	2010-03-18 01:06	< 1 min	0.0153119	0.0153117	0.0000001
EARTH	2010-06-04 11:30	< 1 s	0.0334196	0.0334190	0.0000002
EARTH	2015-06-13 23:14	< 1 min	0.0929954	0.0929947	0.0000002
VENUS	2016-03-22 20:18	< 1 min	0.0417257	0.0417208	0.0000016
EARTH	2020-06-25 01:33	< 1 min	0.1043183	0.1043158	0.0000008
VENUS	2021-10-04 12:16	< 1 min	0.0167927	0.0167827	0.0000033
MERCURY	2023-07-18 13:45	1.8	0.0195045	0.0194983	0.0000021
MERCURY	2025-02-23 15:21	5.6	0.0408391	0.0407287	0.0000368
EARTH	2025-07-05 15:31	2.7	0.0714026	0.0713682	0.0000115
EARTH	2026-06-03 06:25	< 1 min	0.1615556	0.1614810	0.0000249
VENUS	2027-04-18 08:13	1.4	0.0217112	0.0216334	0.0000260
EARTH	2030-07-11 21:05	1.8	0.0168410	0.0168312	0.0000034
MERCURY	2030-09-04 20:54	5.4	0.0347341	0.0344910	0.0000811
EARTH	2031-06-02 00:51	< 1 min	0.0597469	0.0595980	0.0000496
VENUS	2032-10-29 21:08	3.7	0.0471278	0.0468664	0.0000872
EARTH	2035-07-12 19:59	1.7	0.1002712	0.0999929	0.0000928
EARTH	2036-06-03 23:46	8.4	0.0317507	0.0315256	0.0000750
MERCURY	2038-06-25 14:28	12.5	0.0460265	0.0454707	0.0001855
VENUS	2041-04-19 03:32	5.7	0.0429667	0.0425268	0.0001467
EARTH	2041-06-14 10:18	18.3	0.0954973	0.0953977	0.0000332
MERCURY	2045-08-10 13:43	10.2	0.0433055	0.0427911	0.0001716
EARTH	2046-06-27 15:23	14.2	0.1014205	0.1013760	0.0000148
VENUS	2046-10-31 05:24	3.1	0.0097923	0.0095808	0.0000714
EARTH	2051-07-09 23:57	6.8	0.0396384	0.0394935	0.0000483
EARTH	2052-06-01 18:05	1.4	0.1037980	0.1035676	0.0000768
MERCURY	2053-05-27 08:15	15.5	0.0422378	0.0418704	0.0001226
MERCURY	2055-01-01 22:28	9.1	0.0307064	0.0303209	0.0001288
EARTH	2056-07-12 07:50	< 1 min	0.0764792	0.0762945	0.0000616
EARTH	2057-06-03 08:34	3.7	0.0159474	0.0158156	0.0000440
EARTH	2062-06-16 04:10	2.3	0.0983549	0.0983485	0.0000021
VENUS	2065-06-07 21:20	3.6	0.0461401	0.0459143	0.0000753
MERCURY	2066-08-29 18:46	9.1	0.0415119	0.0411275	0.0001283
EARTH	2067-07-03 12:14	11.4	0.0840109	0.0839055	0.0000351
MERCURY	2068-04-04 20:42	25.3	0.0395692	0.0390498	0.0001734
EARTH	2068-06-03 13:33	4.1	0.1804332	0.1801526	0.0000935
EARTH	2072-07-11 23:02	2.7	0.0260589	0.0258392	0.0000735
EARTH	2073-06-02 00:51	1.9	0.0312983	0.0309906	0.0001026
VENUS	2073-11-24 07:33	3.3	0.0491747	0.0487200	0.0001516
MERCURY	2076-01-17 00:05	17.8	0.0365818	0.0361321	0.0001503
EARTH	2077-07-10 21:12	3.0	0.1719687	0.1717437	0.0000750
MERCURY	2077-08-22 14:08	9.5	0.0394002	0.0389488	0.0001507
EARTH	2078-06-10 21:34	8.8	0.0797157	0.0796240	0.0000306
EARTH	2083-06-28 09:18	1.1	0.0998328	0.0998248	0.0000027
EARTH	2088-07-10 15:51	4.9	0.0237936	0.0236696	0.0000415
MERCURY	2089-04-17 20:36	12.9	0.0207585	0.0206345	0.0000433
EARTH	2089-06-01 21:41	< 1 min	0.0756764	0.0754175	0.0000863
MERCURY	2090-11-22 15:51	17.5	0.0160588	0.0159896	0.0000283
EARTH	2093-07-12 08:02	3.6	0.1123675	0.1119052	0.0001541
EARTH	2094-06-05 21:07	16.4	0.0441070	0.0437682	0.0001129
VENUS	2095-06-06 23:58	5.5	0.0366240	0.0359081	0.0002387
EARTH	2099-06-21 02:46	33.4	0.1043313	0.1042941	0.0000124
EARTH	2104-07-07 17:01	21.0	0.0635388	0.0632491	0.0000966
EARTH	2105-06-03 21:53	5.1	0.1390166	0.1385128	0.0001679
VENUS	2108-07-02 07:02	6.8	0.0343096	0.0338146	0.0001654
EARTH	2109-07-13 19:17	< 1 min	0.0602527	0.0599089	0.0001146
EARTH	2110-06-04 10:20	5.4	0.0067892	0.0066228	0.0000566
MERCURY	2111-12-06 12:03	26.0	0.0463195	0.0457005	0.0002065
EARTH	2115-06-21 01:43	20.6	0.1027933	0.1027538	0.0000132
MERCURY	2115-10-16 22:46	16.3	0.0195883	0.0195280	0.0000241
MERCURY	2117-05-20 19:31	15.8	0.0306328	0.0299232	0.0002374
MERCURY	2119-08-26 10:24	14.3	0.0499354	0.0492842	0.0002174
EARTH	2120-07-09 19:45	11.6	0.0450205	0.0447716	0.0000830
MERCURY	2121-03-30 23:02	25.4	0.0286846	0.0280465	0.0002141
EARTH	2121-06-03 07:24	2.6	0.1012261	0.1008636	0.0001208

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