메타데이터
| 항목 |
값 |
| Designation |
C/2025 B2 (Borisov) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2026-09-11T18:41:14.686080Z |
| Orbit solution date (soln_date, UTC) |
2026-09-08T09:12:17Z |
| Obs used |
487 |
| NEO |
- |
| M1 |
6.400 |
| K1 |
8.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-01-20T18:38:49.344000Z |
| Discovery magnitude (MPC) |
20.30 G |
| Discovery observatory (MPC) |
L51 · MARGO, Nauchnyi |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2025-12-18.0000000 |
| e |
1.00182344 |
| q (au) |
8.238951 |
| a (au) |
-4518.357906 |
| i (deg) |
91.744624 |
| Ω (om, deg) |
84.866620 |
| ω (w, deg) |
78.859498 |
| M (ma, deg) |
-0.000869 |
밝기
산란 + 전체 선형
$$
M_a = (-0.727 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
-0.727 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
16:43:39.24 |
+76:43:09.2 |
HIP 82111 |
20.36 |
| 2026-09-20 12:00 |
16:44:02.92 |
+76:38:04.1 |
HIP 82111 |
24.54 |
| 2026-09-21 00:00 |
16:44:26.81 |
+76:32:59.3 |
HIP 81771 |
24.14 |
| 2026-09-21 12:00 |
16:44:50.91 |
+76:27:54.7 |
HIP 81771 |
20.09 |
| 2026-09-22 00:00 |
16:45:15.22 |
+76:22:50.3 |
HIP 81771 |
16.76 |
| 2026-09-22 12:00 |
16:45:39.73 |
+76:17:46.3 |
HIP 81771 |
14.64 |
| 2026-09-23 00:00 |
16:46:04.45 |
+76:12:42.5 |
HIP 81771 |
14.30 |
| 2026-09-23 12:00 |
16:46:29.36 |
+76:07:39.0 |
HIP 81771 |
15.84 |
| 2026-09-24 00:00 |
16:46:54.46 |
+76:02:35.8 |
HIP 81771 |
18.81 |
| 2026-09-24 12:00 |
16:47:19.75 |
+75:57:32.9 |
HIP 82496 |
21.19 |
| 2026-09-25 00:00 |
16:47:45.23 |
+75:52:30.4 |
HIP 82496 |
16.90 |
| 2026-09-25 12:00 |
16:48:10.88 |
+75:47:28.2 |
HIP 82496 |
13.30 |
| 2026-09-26 00:00 |
16:48:36.72 |
+75:42:26.3 |
HIP 82496 |
11.11 |
| 2026-09-26 12:00 |
16:49:02.72 |
+75:37:24.7 |
HIP 82496 |
11.18 |
| 2026-09-27 00:00 |
16:49:28.90 |
+75:32:23.5 |
HIP 82345 |
9.64 |
| 2026-09-27 12:00 |
16:49:55.24 |
+75:27:22.7 |
HIP 82345 |
4.86 |
| 2026-09-28 00:00 |
16:50:21.75 |
+75:22:22.2 |
HIP 82345 |
3.18 |
| 2026-09-28 12:00 |
16:50:48.42 |
+75:17:22.1 |
HIP 82345 |
7.25 |
| 2026-09-29 00:00 |
16:51:15.25 |
+75:12:22.4 |
HIP 82345 |
12.28 |
| 2026-09-29 12:00 |
16:51:42.24 |
+75:07:23.1 |
HIP 82580 |
16.84 |
| 2026-09-30 00:00 |
16:52:09.37 |
+75:02:24.2 |
HIP 82580 |
21.37 |
| 2026-09-30 12:00 |
16:52:36.66 |
+74:57:25.7 |
HIP 82746 |
23.93 |
| 2026-10-01 00:00 |
16:53:04.10 |
+74:52:27.6 |
HIP 82746 |
18.65 |
| 2026-10-01 12:00 |
16:53:31.68 |
+74:47:29.9 |
HIP 82746 |
13.38 |
| 2026-10-02 00:00 |
16:53:59.40 |
+74:42:32.7 |
HIP 82746 |
8.10 |
| 2026-10-02 12:00 |
16:54:27.27 |
+74:37:35.9 |
HIP 82746 |
2.82 |
| 2026-10-03 00:00 |
16:54:55.27 |
+74:32:39.6 |
HIP 82746 |
2.46 |
| 2026-10-03 12:00 |
16:55:23.41 |
+74:27:43.7 |
HIP 82773 |
1.89 |
| 2026-10-04 00:00 |
16:55:51.68 |
+74:22:48.3 |
HIP 82886 |
6.12 |
| 2026-10-04 12:00 |
16:56:20.08 |
+74:17:53.4 |
HIP 82886 |
0.92 |
| 2026-10-05 00:00 |
16:56:48.62 |
+74:12:59.0 |
HIP 82886 |
4.47 |
| 2026-10-05 12:00 |
16:57:17.28 |
+74:08:05.1 |
HIP 82886 |
9.74 |
| 2026-10-06 00:00 |
16:57:46.06 |
+74:03:11.7 |
HIP 82886 |
15.01 |
| 2026-10-06 12:00 |
16:58:14.97 |
+73:58:18.8 |
HIP 82886 |
20.28 |
| 2026-10-07 00:00 |
16:58:43.99 |
+73:53:26.5 |
HIP 82886 |
25.55 |
| 2026-10-07 12:00 |
16:59:13.14 |
+73:48:34.7 |
HIP 83678 |
30.36 |
| 2026-10-08 00:00 |
16:59:42.40 |
+73:43:43.4 |
HIP 83291 |
25.88 |
| 2026-10-08 12:00 |
17:00:11.77 |
+73:38:52.7 |
HIP 83291 |
20.67 |
| 2026-10-09 00:00 |
17:00:41.26 |
+73:34:02.6 |
HIP 83291 |
15.52 |
| 2026-10-09 12:00 |
17:01:10.85 |
+73:29:13.1 |
HIP 83291 |
10.48 |
| 2026-10-10 00:00 |
17:01:40.56 |
+73:24:24.2 |
HIP 83291 |
5.88 |
| 2026-10-10 12:00 |
17:02:10.36 |
+73:19:35.9 |
HIP 83291 |
3.85 |
| 2026-10-11 00:00 |
17:02:40.27 |
+73:14:48.2 |
HIP 83291 |
7.11 |