메타데이터
| 항목 |
값 |
| Designation |
C/2025 B2 (Borisov) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2026-09-11T13:05:35.995200Z |
| Orbit solution date (soln_date, UTC) |
2026-03-07T14:43:13Z |
| Obs used |
250 |
| NEO |
- |
| M1 |
6.700 |
| K1 |
8.750 |
| 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) |
2025-06-03.0000000 |
| e |
1.00110588 |
| q (au) |
8.239543 |
| a (au) |
-7450.695253 |
| i (deg) |
91.744063 |
| Ω (om, deg) |
84.865584 |
| ω (w, deg) |
78.841042 |
| M (ma, deg) |
-0.000713 |
밝기
산란 + 전체 선형
$$
M_a = (-0.120 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
-0.120 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.502 |
| 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) |
| 2026-03-26 00:00 |
23:16:26.93 |
+79:36:55.4 |
HIP 114534 |
12.17 |
| 2026-03-26 12:00 |
23:16:58.20 |
+79:37:47.8 |
HIP 114534 |
13.51 |
| 2026-03-27 00:00 |
23:17:29.36 |
+79:38:41.7 |
HIP 115044 |
13.84 |
| 2026-03-27 12:00 |
23:18:00.40 |
+79:39:37.0 |
HIP 115044 |
12.84 |
| 2026-03-28 00:00 |
23:18:31.32 |
+79:40:33.9 |
HIP 115044 |
11.97 |
| 2026-03-28 12:00 |
23:19:02.12 |
+79:41:32.1 |
HIP 115044 |
11.25 |
| 2026-03-29 00:00 |
23:19:32.80 |
+79:42:31.8 |
HIP 115044 |
10.72 |
| 2026-03-29 12:00 |
23:20:03.36 |
+79:43:33.0 |
HIP 115044 |
10.42 |
| 2026-03-30 00:00 |
23:20:33.79 |
+79:44:35.7 |
HIP 115044 |
10.36 |
| 2026-03-30 12:00 |
23:21:04.10 |
+79:45:39.7 |
HIP 115044 |
10.55 |
| 2026-03-31 00:00 |
23:21:34.29 |
+79:46:45.2 |
HIP 115044 |
11.00 |
| 2026-03-31 12:00 |
23:22:04.35 |
+79:47:52.2 |
HIP 115044 |
11.66 |
| 2026-04-01 00:00 |
23:22:34.28 |
+79:49:00.5 |
HIP 115044 |
12.51 |
| 2026-04-01 12:00 |
23:23:04.08 |
+79:50:10.3 |
HIP 115773 |
11.51 |
| 2026-04-02 00:00 |
23:23:33.75 |
+79:51:21.5 |
HIP 115773 |
10.57 |
| 2026-04-02 12:00 |
23:24:03.28 |
+79:52:34.1 |
HIP 115773 |
9.89 |
| 2026-04-03 00:00 |
23:24:32.69 |
+79:53:48.2 |
HIP 115773 |
9.52 |
| 2026-04-03 12:00 |
23:25:01.95 |
+79:55:03.6 |
HIP 115773 |
9.50 |
| 2026-04-04 00:00 |
23:25:31.09 |
+79:56:20.5 |
HIP 115773 |
9.84 |
| 2026-04-04 12:00 |
23:26:00.08 |
+79:57:38.7 |
HIP 115773 |
10.52 |
| 2026-04-05 00:00 |
23:26:28.93 |
+79:58:58.4 |
HIP 115693 |
11.13 |
| 2026-04-05 12:00 |
23:26:57.64 |
+80:00:19.4 |
HIP 115693 |
9.90 |
| 2026-04-06 00:00 |
23:27:26.21 |
+80:01:41.9 |
HIP 115693 |
8.85 |
| 2026-04-06 12:00 |
23:27:54.63 |
+80:03:05.7 |
HIP 115693 |
8.07 |
| 2026-04-07 00:00 |
23:28:22.90 |
+80:04:30.9 |
HIP 115693 |
7.64 |
| 2026-04-07 12:00 |
23:28:51.03 |
+80:05:57.5 |
HIP 115693 |
7.64 |
| 2026-04-08 00:00 |
23:29:19.00 |
+80:07:25.4 |
HIP 115693 |
8.06 |
| 2026-04-08 12:00 |
23:29:46.81 |
+80:08:54.7 |
HIP 115693 |
8.86 |
| 2026-04-09 00:00 |
23:30:14.47 |
+80:10:25.4 |
HIP 115693 |
9.96 |
| 2026-04-09 12:00 |
23:30:41.97 |
+80:11:57.5 |
HIP 115693 |
11.27 |
| 2026-04-10 00:00 |
23:31:09.31 |
+80:13:30.9 |
HIP 115693 |
12.73 |
| 2026-04-10 12:00 |
23:31:36.49 |
+80:15:05.7 |
HIP 115693 |
14.30 |
| 2026-04-11 00:00 |
23:32:03.50 |
+80:16:41.8 |
HIP 115693 |
15.96 |
| 2026-04-11 12:00 |
23:32:30.34 |
+80:18:19.2 |
HIP 115693 |
17.67 |
| 2026-04-12 00:00 |
23:32:57.01 |
+80:19:58.0 |
HIP 115693 |
19.44 |
| 2026-04-12 12:00 |
23:33:23.50 |
+80:21:38.2 |
HIP 115693 |
21.25 |
| 2026-04-13 00:00 |
23:33:49.82 |
+80:23:19.6 |
HIP 115693 |
23.10 |
| 2026-04-13 12:00 |
23:34:15.95 |
+80:25:02.4 |
HIP 116960 |
24.31 |
| 2026-04-14 00:00 |
23:34:41.90 |
+80:26:46.5 |
HIP 116960 |
22.46 |
| 2026-04-14 12:00 |
23:35:07.67 |
+80:28:32.0 |
HIP 116960 |
20.65 |
| 2026-04-15 00:00 |
23:35:33.24 |
+80:30:18.7 |
HIP 116960 |
18.89 |
| 2026-04-15 12:00 |
23:35:58.61 |
+80:32:06.8 |
HIP 116960 |
17.20 |
| 2026-04-16 00:00 |
23:36:23.79 |
+80:33:56.2 |
HIP 116960 |
15.62 |