List of unnumbered trans-Neptunian objects: 1999

The following is a partial list of unnumbered trans-Neptunian objects for principal designations assigned within 1999. As of April 2022, it contains a total of 94 bodies. ^{[1] [2] [3]} For more information see the description on the main page. Also see list for the previous and next year .

1999

See also: List of unnumbered trans-Neptunian objects

Designation	First Observed (discovered)		D (km)	Orbital description						Remarks	Refs
	Date	Observer (Site)		Class	a (AU)	e	i (°)	q (AU)	Q (AU)
1999 CA119	10 February 1999	Mauna Kea Obs. ( 568 )	99	cubewano?	45.2	0.00	0	45.2	45.2	—	MPC  · JPL
1999 CA132	11 February 1999	Mauna Kea Obs. (568)	114	cubewano?	44.0	0.10	12	39.7	48.3	—	MPC  · JPL
1999 CB119	10 February 1999	J. X. Luu D. C. Jewitt C. Trujillo (568)	204	cubewano (hot)	46.7	0.12	9	40.9	52.5	BR-mag: 1.93; taxonomy: RR	MPC  · JPL
1999 CC119	10 February 1999	J. X. Luu D. C. Jewitt C. Trujillo (568)	121	cubewano (cold)	44.6	0.07	1	41.3	47.9	—	MPC  · JPL
1999 CD119	10 February 1999	Mauna Kea Obs. (568)	119	cubewano?	44.0	0.03	2	42.8	45.2	—	MPC  · JPL
1999 CG154	11 February 1999	J. X. Luu C. Trujillo D. C. Jewitt (568)	110	cubewano (cold)	42.8	0.10	1	38.7	46.9	—	MPC  · JPL
1999 CH119	11 February 1999	C. Trujillo D. C. Jewitt J. X. Luu (568)	158	other TNO	43.1	0.09	20	39.3	46.8	—	MPC  · JPL
1999 CH154	12 February 1999	J. X. Luu C. Trujillo D. C. Jewitt (568)	98	cubewano (cold)	42.8	0.01	1	42.1	43.4	—	MPC  · JPL
1999 CJ119	11 February 1999	C. Trujillo D. C. Jewitt J. X. Luu (568)	110	cubewano (cold)	45.0	0.06	3	42.3	47.8	BR-mag: 2.07	MPC  · JPL
1999 CK119	11 February 1999	Mauna Kea Obs. (568)	90	cubewano?	42.1	0.00	12	42.1	42.1	—	MPC  · JPL
1999 CK158	10 February 1999	D. C. Jewitt J. X. Luu C. Trujillo (568)	91	other TNO	40.6	0.07	17	37.7	43.5	—	MPC  · JPL
1999 CM119	11 February 1999	J. X. Luu C. Trujillo D. C. Jewitt (568)	87	cubewano (cold)	43.7	0.10	3	39.5	47.9	BR-mag: 1.78	MPC  · JPL
1999 CM153	11 February 1999	C. Trujillo J. X. Luu D. C. Jewitt (568)	110	cubewano (cold)	45.4	0.14	0	39.2	51.6	—	MPC  · JPL
1999 CN119	11 February 1999	J. X. Luu C. Trujillo D. C. Jewitt (568)	80	cubewano (cold)	43.5	0.04	1	41.7	45.3	—	MPC  · JPL
1999 CN153	11 February 1999	C. Trujillo J. X. Luu D. C. Jewitt (568)	148	cubewano (hot)	43.6	0.11	7	38.6	48.6	—	MPC  · JPL
1999 CP153	10 February 1999	J. X. Luu C. Trujillo D. C. Jewitt (568)	99	cubewano?	44.8	0.16	3	37.4	52.2	—	MPC  · JPL
1999 CQ133	12 February 1999	C. Trujillo J. X. Luu D. C. Jewitt (568)	213	cubewano (hot)	41.1	0.10	13	37.1	45.1	BR-mag: 1.35	MPC  · JPL
1999 CQ153	11 February 1999	J. X. Luu C. Trujillo D. C. Jewitt (568)	83	cubewano (cold)	46.1	0.06	0	43.5	48.7	—	MPC  · JPL
1999 CR133	12 February 1999	Mauna Kea Obs. (568)	82	cubewano?	42.2	0.00	2	42.2	42.2	—	MPC  · JPL
1999 CR153	11 February 1999	Mauna Kea Obs. (568)	79	cubewano?	43.1	0.05	1	40.9	45.3	—	MPC  · JPL
1999 CS153	11 February 1999	C. Trujillo J. X. Luu D. C. Jewitt (568)	82	cubewano?	44.2	0.12	1	39.0	49.4	—	MPC  · JPL
1999 CT153	11 February 1999	Mauna Kea Obs. (568)	82	cubewano?	45.1	0.09	5	40.9	49.3	—	MPC  · JPL
1999 CW118	10 February 1999	Mauna Kea Obs. (568)	95	cubewano?	43.5	0.00	1	43.5	43.5	—	MPC  · JPL
1999 CW131	10 February 1999	C. Trujillo J. X. Luu D. C. Jewitt (568)	90	cubewano?	43.2	0.01	8	42.5	43.9	—	MPC  · JPL
1999 CX118	10 February 1999	Mauna Kea Obs. (568)	130	cubewano?	43.7	0.03	2	42.5	44.9	—	MPC  · JPL
1999 CY118	10 February 1999	D. C. Jewitt C. Trujillo J. X. Luu (568)	70	SDO	89.4	0.61	26	34.6	144	—	MPC  · JPL
1999 CY131	11 February 1999	Mauna Kea Obs. (568)	100	other TNO	43.9	0.14	25	38.0	49.9	—	MPC  · JPL
1999 CZ118	10 February 1999	D. C. Jewitt C. Trujillo J. X. Luu (568)	99	SDO	116	0.68	28	37.5	194	—	MPC  · JPL
1999 CZ131	11 February 1999	Mauna Kea Obs. (568)	82	cubewano?	44.4	0.03	2	43.0	45.9	—	MPC  · JPL
1999 DA	16 February 1999	B. Gladman J. J. Kavelaars A. Morbidelli M. J. Holman (568)	87	cubewano (cold)	43.0	0.08	3	39.8	46.3	—	MPC  · JPL
1999 DA8	16 February 1999	Mauna Kea Obs. (568)	16	plutino?	39.3	0.33	40	26.4	52.2	—	MPC  · JPL
1999 DB8	16 February 1999	Mauna Kea Obs. (568)	42	other TNO	42.5	0.10	22	38.2	46.8	—	MPC  · JPL
1999 DC8	16 February 1999	Mauna Kea Obs. (568)	34	cubewano?	45.9	0.00	5	45.9	45.9	—	MPC  · JPL
1999 DD8	16 February 1999	Mauna Kea Obs. (568)	28	plutino?	39.4	0.23	6	30.3	48.5	—	MPC  · JPL
1999 DE8	16 February 1999	Mauna Kea Obs. (568)	41	cubewano?	45.6	0.00	4	45.6	45.6	—	MPC  · JPL
1999 DF8	16 February 1999	Mauna Kea Obs. (568)	36	cubewano?	44.2	0.00	3	44.2	44.2	—	MPC  · JPL
1999 DG8	16 February 1999	Mauna Kea Obs. (568)	91	SDO	82.2	0.60	40	33.0	131	—	MPC  · JPL
1999 DH8	16 February 1999	B. Gladman J. J. Kavelaars A. Morbidelli M. J. Holman (568)	60	cubewano (cold)	43.8	0.07	5	40.8	46.9	—	MPC  · JPL
1999 DL8	16 February 1999	Mauna Kea Obs. (568)	62	cubewano (hot)	42.5	0.00	6	42.5	42.5	—	MPC  · JPL
1999 DM8	16 February 1999	Mauna Kea Obs. (568)	39	cubewano?	42.9	0.00	4	42.9	42.9	—	MPC  · JPL
1999 DN8	16 February 1999	Mauna Kea Obs. (568)	38	cubewano?	44.3	0.00	3	44.3	44.3	—	MPC  · JPL
1999 DO8	16 February 1999	Mauna Kea Obs. (568)	34	cubewano?	41.8	0.00	3	41.8	41.8	—	MPC  · JPL
1999 DP8	16 February 1999	Mauna Kea Obs. (568)	63	SDO	116	0.70	38	34.7	197	—	MPC  · JPL
1999 DQ8	16 February 1999	Mauna Kea Obs. (568)	52	cubewano?	45.3	0.00	14	45.3	45.3	—	MPC  · JPL
1999 DR8	16 February 1999	Mauna Kea Obs. (568)	47	cubewano?	45.5	0.11	8	40.4	50.6	—	MPC  · JPL
1999 DZ7	16 February 1999	Mauna Kea Obs. (568)	82	plutino?	39.4	0.27	14	28.9	49.9	—	MPC  · JPL
1999 GS46	12 April 1999	A. Delsanti O. R. Hainaut ( 809 )	214	cubewano (hot)	44.5	0.08	5	40.9	48.2	BR-mag: 1.76	MPC  · JPL
1999 HA12	17 April 1999	Kitt Peak Obs. ( 695 )	95	cubewano?	43.1	0.06	4	40.6	45.7	—	MPC  · JPL
1999 HG12	18 April 1999	R. Millis M. W. Buie (695)	131	res  · 4:7	43.6	0.16	1	36.7	50.5	BR-mag: 1.61; taxonomy: IR-RR	MPC  · JPL
1999 HH12	18 April 1999	R. Millis M. W. Buie (695)	132	cubewano (cold)	43.5	0.02	1	42.5	44.5	—	MPC  · JPL
1999 HJ12	18 April 1999	R. Millis M. W. Buie (695)	110	cubewano (cold)	43.1	0.05	5	40.9	45.4	—	MPC  · JPL
1999 HS11	17 April 1999	M. W. Buie R. Millis (695)	139	cubewano (cold)	44.1	0.02	3	43.2	45.0	BR-mag: 1.76; taxonomy: RR	MPC  · JPL
1999 HY11	17 April 1999	Kitt Peak Obs. (695)	75	cubewano?	42.2	0.06	6	39.6	44.7	—	MPC  · JPL
1999 HZ11	17 April 1999	Kitt Peak Obs. (695)	72	cubewano?	42.4	0.08	10	39.0	45.7	—	MPC  · JPL
1999 JA132	10 May 1999	Cerro Tololo Obs. ( 807 )	99	cubewano?	44.6	0.00	7	44.5	44.6	—	MPC  · JPL
1999 JB132	10 May 1999	Cerro Tololo Obs. (807)	108	plutino?	39.5	0.28	13	28.7	50.4	—	MPC  · JPL
1999 JC132	10 May 1999	Cerro Tololo Obs. (807)	86	plutino?	39.5	0.24	6	29.9	49.2	—	MPC  · JPL
1999 JD132	10 May 1999	R. L. Allen G. Bernstein P. Guhathakurta (807)	148	cubewano (hot)	43.3	0.06	11	40.5	46.0	BR-mag: 1.59	MPC  · JPL
1999 JE132	10 May 1999	Cerro Tololo Obs. (807)	90	plutino?	39.4	0.20	25	31.8	47.1	—	MPC  · JPL
1999 JF132	10 May 1999	Cerro Tololo Obs. (807)	90	cubewano?	44.5	0.00	2	44.5	44.5	—	MPC  · JPL
1999 JH132	10 May 1999	Cerro Tololo Obs. (807)	41	cubewano?	42.0	0.00	1	42.0	42.0	—	MPC  · JPL
1999 JJ132	10 May 1999	Cerro Tololo Obs. (807)	60	cubewano?	45.8	0.10	3	41.1	50.5	—	MPC  · JPL
1999 JK132	10 May 1999	Cerro Tololo Obs. (807)	68	plutino?	39.3	0.17	16	32.8	45.9	—	MPC  · JPL
1999 KK17	18 May 1999	Cerro Tololo Obs. (807)	60	cubewano?	45.5	0.00	4	45.5	45.5	—	MPC  · JPL
1999 KL17	18 May 1999	Cerro Tololo Obs. (807)	62	cubewano?	46.2	0.03	3	44.9	47.6	—	MPC  · JPL
1999 KR18	18 May 1999	R. L. Allen G. Bernstein P. Guhathakurta (807)	95	res  · 4:7	43.9	0.20	1	35.1	52.7	—	MPC  · JPL
1999 KT16	18 May 1999	Cerro Tololo Obs. (807)	60	cubewano?	46.4	0.00	9	46.4	46.4	—	MPC  · JPL
1999 LB37	8 June 1999	Palomar Obs. ( 675 )	57	plutino?	39.5	0.19	15	31.9	47.1	—	MPC  · JPL
1999 OA4	21 July 1999	J. J. Kavelaars B. Gladman M. J. Holman J.-M. Petit ( 568 )	87	cubewano (cold)	44.8	0.06	3	42.0	47.5	—	MPC  · JPL
1999 OC4	18 July 1999	Mauna Kea Obs. (568)	73	cubewano (cold)	45.9	0.17	1	38.0	53.8	—	MPC  · JPL
1999 OD4	19 July 1999	Mauna Kea Obs. (568)	124	cubewano?	41.8	0.09	14	37.9	45.6	—	MPC  · JPL
1999 OG4	20 July 1999	Mauna Kea Obs. (568)	96	cubewano (cold)	47.4	0.13	1	41.3	53.5	—	MPC  · JPL
1999 OH4	18 July 1999	Mauna Kea Obs. (568)	91	other TNO	40.8	0.04	28	39.0	42.6	BR-mag: 3.20	MPC  · JPL
1999 OK4	19 July 1999	Mauna Kea Obs. (568)	126	other TNO	43.5	0.15	30	36.9	50.2	—	MPC  · JPL
1999 OZ3	21 July 1999	J. J. Kavelaars B. Gladman M. J. Holman J.-M. Petit (568)	110	cubewano (cold)	44.4	0.08	3	40.7	48.1	—	MPC  · JPL
1999 RB215	6 September 1999	J. X. Luu C. Trujillo D. C. Jewitt (568)	48	twotino	47.9	0.34	8	31.4	64.5	—	MPC  · JPL
1999 RC216	8 September 1999	Mauna Kea Obs. (568)	119	cubewano?	44.4	0.08	1	40.8	48.0	—	MPC  · JPL
1999 RF215	7 September 1999	Mauna Kea Obs. (568)	114	cubewano?	44.0	0.00	4	44.0	44.0	—	MPC  · JPL
1999 RG215	7 September 1999	J. X. Luu D. C. Jewitt C. Trujillo (568)	120	cubewano (cold)	46.8	0.08	0	43.2	50.4	—	MPC  · JPL
1999 RK257	12 September 1999	Mauna Kea Obs. (568)	91	other TNO	43.2	0.05	18	41.0	45.4	—	MPC  · JPL
1999 RR215	7 September 1999	D. C. Jewitt C. Trujillo J. X. Luu (568)	80	cubewano (cold)	44.3	0.11	1	39.7	49.0	—	MPC  · JPL
1999 RS214	6 September 1999	Mauna Kea Obs. (568)	90	cubewano?	43.0	0.00	3	43.0	43.0	—	MPC  · JPL
1999 RT214	6 September 1999	C. Trujillo J. X. Luu D. C. Jewitt (568)	100	cubewano (cold)	42.9	0.06	3	40.6	45.3	albedo: 0.210; binary: 69 km	MPC  · JPL
1999 RT215	7 September 1999	Mauna Kea Obs. (568)	158	other TNO	43.1	0.00	22	43.1	43.1	—	MPC  · JPL
1999 RU214	6 September 1999	C. Trujillo D. C. Jewitt J. X. Luu (568)	146	res  · 2:5	56.2	0.34	4	37.0	75.4	—	MPC  · JPL
1999 RV214	6 September 1999	J. X. Luu D. C. Jewitt C. Trujillo (568)	87	cubewano (cold)	46.8	0.05	1	44.6	49.0	—	MPC  · JPL
1999 RV215	7 September 1999	J. X. Luu D. C. Jewitt C. Trujillo (568)	87	other TNO	44.8	0.19	22	36.4	53.2	—	MPC  · JPL
1999 RW214	6 September 1999	J. X. Luu C. Trujillo D. C. Jewitt (568)	115	cubewano (cold)	43.2	0.03	1	41.8	44.6	—	MPC  · JPL
1999 RW215	7 September 1999	J. X. Luu D. C. Jewitt C. Trujillo (568)	93	res  · 3:4	36.4	0.16	11	30.7	42.2	—	MPC  · JPL
1999 RX214	6 September 1999	D. C. Jewitt C. Trujillo J. X. Luu (568)	145	cubewano (cold)	46.4	0.17	5	38.4	54.4	BR-mag: 1.63; taxonomy: IR	MPC  · JPL
1999 RX215	8 September 1999	D. C. Jewitt C. Trujillo J. X. Luu (568)	100	cubewano (cold)	47.4	0.15	1	40.5	54.3	—	MPC  · JPL
1999 RZ214	6 September 1999	C. Trujillo J. X. Luu D. C. Jewitt (568)	104	SDO	86.1	0.57	21	36.7	136	—	MPC  · JPL
1999 SA28	16 September 1999	Mauna Kea Obs. (568)	164	plutino?	39.2	0.18	11	32.0	46.5	—	MPC  · JPL
1999 TR11	9 October 1999	S. S. Sheppard (568)	99	plutino	39.3	0.25	17	29.7	49.0	BR-mag: 1.77; taxonomy: RR	MPC  · JPL

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References

1. "List Of Transneptunian Objects". Minor Planet Center. 16 April 2022. Retrieved 16 April 2022.
2. "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. 16 April 2022. Retrieved 16 April 2022.
3. "List of Known Trans-Neptunian Objects". Johnston's Archive. 2 January 2022. Retrieved 16 April 2022.