메타데이터

항목	값
Designation	C/2026 B2 (Sun-Gao)
Type	C
Perihelion (tp_cal, UTC)	2026-01-10T02:51:05.140800Z
Orbit solution date (soln_date, UTC)	2026-08-25T08:42:11Z
Obs used	194
NEO	-
M1	13.500
K1	8.750
PC	-
Discovery observation (MPC, UTC)	2026-01-19T00:03:36.864000Z
Discovery magnitude (MPC)	15.50 G
Discovery observatory (MPC)	N86 · Xingming Observatory-KATS, Nanshan

Osculating 궤도요소

항목	값
Epoch (epoch_cal, TDB)	2026-02-14.0000000
e	0.99759879
q (au)	1.284257
a (au)	534.838325
i (deg)	59.578698
Ω (om, deg)	234.638526
ω (w, deg)	47.299433
M (ma, deg)	0.002779

밝기

산란 + 전체 선형

$$ M_a = (12.639 + 3.129\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

모델 상수

항목	값
H0	12.639
n	3.129
gf	0.999
gb	-1.000
k	1.000
δ90	10.000

파라미터	기호	범위	설명
태양·지구거리 1 AU에서의 절대등급	H0	-5 to 20	혜성의 고유 밝기
광도 기울기 파라미터	n	2 to 6	태양거리 변화에 따른 밝기 변화율
전방 산란 비대칭 계수	gf	0.8 to 1	전방 산란의 강도
후방 산란 비대칭 계수	gb	-1 to -0.5	후방 산란의 강도
분할 계수	k	0.8 to 1	전·후방 산란 기여도 비율
먼지/가스 밝기 비	δ90	1 to 10	코마에서 먼지 산란 대비 가스 방출의 상대 기여

참고: EPSC-DPS2025-160

잔차 (구간 선형)

$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$

시작일 (UTC)	끝 (UTC)	a	b
2026-01-19	2026-02-25	-44.5327	+5.176
2026-02-25	2026-08-24	+8.1966	-2.535

log10 r = log10(태양거리/AU), Δ = 지구거리(AU)

찾아보기

천체력

Date/Time (UTC)	RA (J2000)	Dec (J2000)	Nearest HIP	Dist from HIP (arcmin)
2026-09-20 00:00	02:57:20.88	+45:31:45.8	HIP 13734	24.97
2026-09-20 12:00	02:56:56.39	+45:29:43.3	HIP 13734	22.41
2026-09-21 00:00	02:56:31.56	+45:27:37.9	HIP 13734	20.61
2026-09-21 12:00	02:56:06.41	+45:25:29.5	HIP 13734	19.84
2026-09-22 00:00	02:55:40.93	+45:23:18.1	HIP 13734	20.26
2026-09-22 12:00	02:55:15.14	+45:21:03.8	HIP 13734	21.86
2026-09-23 00:00	02:54:49.03	+45:18:46.5	HIP 13734	24.45
2026-09-23 12:00	02:54:22.61	+45:16:26.1	HIP 13734	27.80
2026-09-24 00:00	02:53:55.89	+45:14:02.7	HIP 13343	25.62
2026-09-24 12:00	02:53:28.86	+45:11:36.2	HIP 13343	20.29
2026-09-25 00:00	02:53:01.55	+45:09:06.7	HIP 13343	14.89
2026-09-25 12:00	02:52:33.94	+45:06:34.1	HIP 13343	9.44
2026-09-26 00:00	02:52:06.06	+45:03:58.3	HIP 13343	4.05
2026-09-26 12:00	02:51:37.89	+45:01:19.4	HIP 13343	2.45
2026-09-27 00:00	02:51:09.45	+44:58:37.4	HIP 13343	7.76
2026-09-27 12:00	02:50:40.74	+44:55:52.3	HIP 13360	12.96
2026-09-28 00:00	02:50:11.77	+44:53:03.9	HIP 13360	17.92
2026-09-28 12:00	02:49:42.55	+44:50:12.4	HIP 13360	23.35
2026-09-29 00:00	02:49:13.07	+44:47:17.7	HIP 13360	29.03
2026-09-29 12:00	02:48:43.35	+44:44:19.8	HIP 13036	30.81
2026-09-30 00:00	02:48:13.38	+44:41:18.6	HIP 13036	26.09
2026-09-30 12:00	02:47:43.18	+44:38:14.2	HIP 13036	22.01
2026-10-01 00:00	02:47:12.76	+44:35:06.6	HIP 13036	19.06
2026-10-01 12:00	02:46:42.11	+44:31:55.7	HIP 13036	17.89
2026-10-02 00:00	02:46:11.25	+44:28:41.6	HIP 13036	18.89
2026-10-02 12:00	02:45:40.17	+44:25:24.2	HIP 12768	18.60
2026-10-03 00:00	02:45:08.89	+44:22:03.5	HIP 12768	12.16
2026-10-03 12:00	02:44:37.41	+44:18:39.5	HIP 12768	5.83
2026-10-04 00:00	02:44:05.75	+44:15:12.3	HIP 12768	2.62
2026-10-04 12:00	02:43:33.89	+44:11:41.7	HIP 12768	8.30
2026-10-05 00:00	02:43:01.86	+44:08:07.8	HIP 12768	14.92
2026-10-05 12:00	02:42:29.65	+44:04:30.7	HIP 12544	16.20
2026-10-06 00:00	02:41:57.29	+44:00:50.2	HIP 12478	15.17
2026-10-06 12:00	02:41:24.76	+43:57:06.5	HIP 12478	12.00
2026-10-07 00:00	02:40:52.08	+43:53:19.4	HIP 12478	12.45
2026-10-07 12:00	02:40:19.26	+43:49:29.0	HIP 12478	16.30
2026-10-08 00:00	02:39:46.30	+43:45:35.4	HIP 12478	21.87
2026-10-08 12:00	02:39:13.21	+43:41:38.4	HIP 12339	27.70
2026-10-09 00:00	02:38:39.99	+43:37:38.2	HIP 12339	23.63
2026-10-09 12:00	02:38:06.67	+43:33:34.6	HIP 12339	21.26
2026-10-10 00:00	02:37:33.23	+43:29:27.9	HIP 12082	20.90
2026-10-10 12:00	02:36:59.70	+43:25:17.8	HIP 12082	17.42
2026-10-11 00:00	02:36:26.07	+43:21:04.5	HIP 12082	16.73