메타데이터
| 항목 |
값 |
| Designation |
C/2023 T2 (Borisov) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-12-22T18:54:38.292480Z |
| Orbit solution date (soln_date, UTC) |
2024-04-13T16:42:50Z |
| Obs used |
368 |
| NEO |
- |
| M1 |
11.800 |
| K1 |
18.500 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2023-10-14T16:40:30.720000Z |
| Discovery magnitude (MPC) |
19.40 G |
| Discovery observatory (MPC) |
L51 · MARGO, Nauchnyi |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2023-11-23.0000000 |
| e |
0.99137332 |
| q (au) |
1.995438 |
| a (au) |
231.310079 |
| i (deg) |
48.596685 |
| Ω (om, deg) |
317.534632 |
| ω (w, deg) |
111.190785 |
| M (ma, deg) |
359.991654 |
밝기
산란 + 전체 선형
$$
M_a = (12.017 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.017 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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 |
| 2023-08-14 |
2023-12-19 |
+8.4189 |
-2.661 |
| 2023-12-31 |
2024-04-05 |
-9.5022 |
+2.693 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
10:32:58.81 |
-35:38:31.0 |
HIP 51473 |
27.18 |
| 2026-03-26 12:00 |
10:32:44.99 |
-35:37:02.5 |
HIP 51473 |
25.05 |
| 2026-03-27 00:00 |
10:32:31.27 |
-35:35:33.1 |
HIP 51473 |
23.18 |
| 2026-03-27 12:00 |
10:32:17.66 |
-35:34:02.6 |
HIP 51473 |
21.64 |
| 2026-03-28 00:00 |
10:32:04.15 |
-35:32:31.2 |
HIP 51473 |
20.50 |
| 2026-03-28 12:00 |
10:31:50.75 |
-35:30:58.9 |
HIP 51473 |
19.82 |
| 2026-03-29 00:00 |
10:31:37.46 |
-35:29:25.6 |
HIP 51473 |
19.64 |
| 2026-03-29 12:00 |
10:31:24.28 |
-35:27:51.4 |
HIP 51473 |
19.97 |
| 2026-03-30 00:00 |
10:31:11.22 |
-35:26:16.3 |
HIP 51530 |
18.98 |
| 2026-03-30 12:00 |
10:30:58.26 |
-35:24:40.4 |
HIP 51530 |
18.19 |
| 2026-03-31 00:00 |
10:30:45.42 |
-35:23:03.5 |
HIP 51530 |
17.88 |
| 2026-03-31 12:00 |
10:30:32.69 |
-35:21:25.9 |
HIP 51530 |
18.07 |
| 2026-04-01 00:00 |
10:30:20.08 |
-35:19:47.4 |
HIP 51530 |
18.74 |
| 2026-04-01 12:00 |
10:30:07.58 |
-35:18:08.1 |
HIP 51349 |
19.48 |
| 2026-04-02 00:00 |
10:29:55.20 |
-35:16:27.9 |
HIP 51349 |
16.81 |
| 2026-04-02 12:00 |
10:29:42.95 |
-35:14:47.1 |
HIP 51349 |
14.28 |
| 2026-04-03 00:00 |
10:29:30.81 |
-35:13:05.4 |
HIP 51349 |
11.98 |
| 2026-04-03 12:00 |
10:29:18.79 |
-35:11:23.0 |
HIP 51349 |
10.03 |
| 2026-04-04 00:00 |
10:29:06.89 |
-35:09:39.9 |
HIP 51349 |
8.68 |
| 2026-04-04 12:00 |
10:28:55.11 |
-35:07:56.0 |
HIP 51349 |
8.22 |
| 2026-04-05 00:00 |
10:28:43.46 |
-35:06:11.5 |
HIP 51349 |
8.76 |
| 2026-04-05 12:00 |
10:28:31.93 |
-35:04:26.3 |
HIP 51349 |
10.15 |
| 2026-04-06 00:00 |
10:28:20.53 |
-35:02:40.4 |
HIP 51349 |
12.07 |
| 2026-04-06 12:00 |
10:28:09.26 |
-35:00:53.9 |
HIP 51349 |
14.32 |
| 2026-04-07 00:00 |
10:27:58.11 |
-34:59:06.7 |
HIP 51349 |
16.75 |
| 2026-04-07 12:00 |
10:27:47.09 |
-34:57:19.0 |
HIP 51349 |
19.29 |
| 2026-04-08 00:00 |
10:27:36.19 |
-34:55:30.6 |
HIP 51112 |
18.46 |
| 2026-04-08 12:00 |
10:27:25.43 |
-34:53:41.7 |
HIP 51112 |
15.63 |
| 2026-04-09 00:00 |
10:27:14.80 |
-34:51:52.2 |
HIP 51112 |
12.82 |
| 2026-04-09 12:00 |
10:27:04.30 |
-34:50:02.1 |
HIP 51112 |
10.04 |
| 2026-04-10 00:00 |
10:26:53.93 |
-34:48:11.6 |
HIP 51112 |
7.31 |
| 2026-04-10 12:00 |
10:26:43.69 |
-34:46:20.5 |
HIP 51112 |
4.67 |
| 2026-04-11 00:00 |
10:26:33.59 |
-34:44:28.9 |
HIP 51112 |
2.44 |
| 2026-04-11 12:00 |
10:26:23.62 |
-34:42:36.8 |
HIP 51112 |
2.34 |
| 2026-04-12 00:00 |
10:26:13.79 |
-34:40:44.3 |
HIP 51112 |
4.49 |
| 2026-04-12 12:00 |
10:26:04.09 |
-34:38:51.4 |
HIP 51112 |
7.05 |
| 2026-04-13 00:00 |
10:25:54.53 |
-34:36:58.0 |
HIP 51112 |
9.70 |
| 2026-04-13 12:00 |
10:25:45.10 |
-34:35:04.2 |
HIP 51112 |
12.36 |
| 2026-04-14 00:00 |
10:25:35.81 |
-34:33:10.1 |
HIP 51112 |
15.02 |
| 2026-04-14 12:00 |
10:25:26.66 |
-34:31:15.5 |
HIP 51112 |
17.67 |
| 2026-04-15 00:00 |
10:25:17.65 |
-34:29:20.7 |
HIP 51112 |
20.31 |
| 2026-04-15 12:00 |
10:25:08.78 |
-34:27:25.4 |
HIP 51112 |
22.95 |
| 2026-04-16 00:00 |
10:25:00.05 |
-34:25:29.9 |
HIP 51112 |
25.56 |