메타데이터
| 항목 |
값 |
| Designation |
C/2020 Q1 (Borisov) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-08-14T15:47:50.138880Z |
| Orbit solution date (soln_date, UTC) |
2022-06-07T21:44:52Z |
| Obs used |
280 |
| NEO |
- |
| M1 |
11.700 |
| K1 |
41.250 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2020-08-17T23:14:45.312000Z |
| Discovery magnitude (MPC) |
17.80 R |
| Discovery observatory (MPC) |
L51 · MARGO, Nauchnyi |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-09-06.0000000 |
| e |
0.97788684 |
| q (au) |
1.314974 |
| a (au) |
59.465667 |
| i (deg) |
142.923814 |
| Ω (om, deg) |
52.379273 |
| ω (w, deg) |
9.884895 |
| M (ma, deg) |
0.048020 |
밝기
산란 + 전체 선형
$$
M_a = (15.650 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.650 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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) |
| 2026-07-29 00:00 |
16:24:38.19 |
-08:55:10.8 |
HIP 80345 |
13.32 |
| 2026-07-29 12:00 |
16:24:33.87 |
-08:55:27.4 |
HIP 80345 |
12.51 |
| 2026-07-30 00:00 |
16:24:29.61 |
-08:55:44.2 |
HIP 80345 |
11.76 |
| 2026-07-30 12:00 |
16:24:25.40 |
-08:56:01.2 |
HIP 80345 |
11.06 |
| 2026-07-31 00:00 |
16:24:21.25 |
-08:56:18.4 |
HIP 80345 |
10.43 |
| 2026-07-31 12:00 |
16:24:17.16 |
-08:56:35.7 |
HIP 80345 |
9.88 |
| 2026-08-01 00:00 |
16:24:13.12 |
-08:56:53.3 |
HIP 80345 |
9.41 |
| 2026-08-01 12:00 |
16:24:09.15 |
-08:57:11.1 |
HIP 80345 |
9.03 |
| 2026-08-02 00:00 |
16:24:05.23 |
-08:57:29.1 |
HIP 80345 |
8.75 |
| 2026-08-02 12:00 |
16:24:01.37 |
-08:57:47.3 |
HIP 80345 |
8.57 |
| 2026-08-03 00:00 |
16:23:57.56 |
-08:58:05.6 |
HIP 80291 |
8.48 |
| 2026-08-03 12:00 |
16:23:53.82 |
-08:58:24.2 |
HIP 80291 |
7.54 |
| 2026-08-04 00:00 |
16:23:50.13 |
-08:58:43.0 |
HIP 80291 |
6.61 |
| 2026-08-04 12:00 |
16:23:46.50 |
-08:59:01.9 |
HIP 80291 |
5.71 |
| 2026-08-05 00:00 |
16:23:42.93 |
-08:59:21.1 |
HIP 80291 |
4.84 |
| 2026-08-05 12:00 |
16:23:39.42 |
-08:59:40.4 |
HIP 80291 |
4.03 |
| 2026-08-06 00:00 |
16:23:35.97 |
-09:00:00.0 |
HIP 80291 |
3.28 |
| 2026-08-06 12:00 |
16:23:32.58 |
-09:00:19.6 |
HIP 80291 |
2.66 |
| 2026-08-07 00:00 |
16:23:29.24 |
-09:00:39.5 |
HIP 80291 |
2.24 |
| 2026-08-07 12:00 |
16:23:25.97 |
-09:00:59.6 |
HIP 80291 |
2.14 |
| 2026-08-08 00:00 |
16:23:22.76 |
-09:01:19.9 |
HIP 80291 |
2.39 |
| 2026-08-08 12:00 |
16:23:19.60 |
-09:01:40.4 |
HIP 80291 |
2.88 |
| 2026-08-09 00:00 |
16:23:16.51 |
-09:02:01.0 |
HIP 80291 |
3.51 |
| 2026-08-09 12:00 |
16:23:13.48 |
-09:02:21.8 |
HIP 80291 |
4.20 |
| 2026-08-10 00:00 |
16:23:10.50 |
-09:02:42.8 |
HIP 80291 |
4.93 |
| 2026-08-10 12:00 |
16:23:07.59 |
-09:03:04.0 |
HIP 80291 |
5.67 |
| 2026-08-11 00:00 |
16:23:04.74 |
-09:03:25.3 |
HIP 80291 |
6.42 |
| 2026-08-11 12:00 |
16:23:01.95 |
-09:03:46.8 |
HIP 80291 |
7.17 |
| 2026-08-12 00:00 |
16:22:59.21 |
-09:04:08.5 |
HIP 80291 |
7.91 |
| 2026-08-12 12:00 |
16:22:56.54 |
-09:04:30.4 |
HIP 80291 |
8.65 |
| 2026-08-13 00:00 |
16:22:53.94 |
-09:04:52.4 |
HIP 80291 |
9.38 |
| 2026-08-13 12:00 |
16:22:51.39 |
-09:05:14.6 |
HIP 80291 |
10.10 |
| 2026-08-14 00:00 |
16:22:48.90 |
-09:05:37.0 |
HIP 80291 |
10.81 |
| 2026-08-14 12:00 |
16:22:46.47 |
-09:05:59.5 |
HIP 80291 |
11.52 |
| 2026-08-15 00:00 |
16:22:44.11 |
-09:06:22.2 |
HIP 80291 |
12.21 |
| 2026-08-15 12:00 |
16:22:41.81 |
-09:06:45.1 |
HIP 80291 |
12.89 |
| 2026-08-16 00:00 |
16:22:39.56 |
-09:07:08.1 |
HIP 80291 |
13.57 |
| 2026-08-16 12:00 |
16:22:37.38 |
-09:07:31.3 |
HIP 80291 |
14.23 |
| 2026-08-17 00:00 |
16:22:35.26 |
-09:07:54.6 |
HIP 80291 |
14.88 |
| 2026-08-17 12:00 |
16:22:33.20 |
-09:08:18.1 |
HIP 80291 |
15.52 |
| 2026-08-18 00:00 |
16:22:31.21 |
-09:08:41.7 |
HIP 80291 |
16.15 |
| 2026-08-18 12:00 |
16:22:29.27 |
-09:09:05.5 |
HIP 80291 |
16.77 |
| 2026-08-19 00:00 |
16:22:27.39 |
-09:09:29.4 |
HIP 80291 |
17.38 |