메타데이터
| 항목 |
값 |
| Designation |
387P/Boattini |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-09-05T08:47:45.003840Z |
| Orbit solution date (soln_date, UTC) |
2021-05-02T23:43:04Z |
| Obs used |
347 |
| NEO |
Yes |
| M1 |
14.200 |
| K1 |
20.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-09-02T00:13:13.152000Z |
| Discovery magnitude (MPC) |
15.80 R |
| Discovery observatory (MPC) |
L51 · MARGO, Nauchnyi |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-04-08.0000000 |
| e |
0.73595147 |
| q (au) |
1.267166 |
| a (au) |
4.798990 |
| i (deg) |
8.899824 |
| Ω (om, deg) |
259.355998 |
| ω (w, deg) |
162.776863 |
| M (ma, deg) |
208.931599 |
밝기
산란 + 전체 선형
$$
M_a = (14.112 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.112 |
| 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) |
| 2026-07-29 00:00 |
16:28:45.11 |
-22:27:53.7 |
HIP 80632 |
14.79 |
| 2026-07-29 12:00 |
16:28:38.88 |
-22:27:30.5 |
HIP 80632 |
13.81 |
| 2026-07-30 00:00 |
16:28:32.79 |
-22:27:07.5 |
HIP 80632 |
12.96 |
| 2026-07-30 12:00 |
16:28:26.84 |
-22:26:44.8 |
HIP 80632 |
12.24 |
| 2026-07-31 00:00 |
16:28:21.02 |
-22:26:22.4 |
HIP 80632 |
11.67 |
| 2026-07-31 12:00 |
16:28:15.33 |
-22:26:00.2 |
HIP 80632 |
11.25 |
| 2026-08-01 00:00 |
16:28:09.78 |
-22:25:38.4 |
HIP 80632 |
10.99 |
| 2026-08-01 12:00 |
16:28:04.37 |
-22:25:16.8 |
HIP 80632 |
10.90 |
| 2026-08-02 00:00 |
16:27:59.09 |
-22:24:55.5 |
HIP 80632 |
10.96 |
| 2026-08-02 12:00 |
16:27:53.94 |
-22:24:34.6 |
HIP 80632 |
11.16 |
| 2026-08-03 00:00 |
16:27:48.94 |
-22:24:13.9 |
HIP 80632 |
11.49 |
| 2026-08-03 12:00 |
16:27:44.06 |
-22:23:53.5 |
HIP 80632 |
11.92 |
| 2026-08-04 00:00 |
16:27:39.33 |
-22:23:33.4 |
HIP 80632 |
12.44 |
| 2026-08-04 12:00 |
16:27:34.73 |
-22:23:13.6 |
HIP 80632 |
13.02 |
| 2026-08-05 00:00 |
16:27:30.28 |
-22:22:54.1 |
HIP 80632 |
13.66 |
| 2026-08-05 12:00 |
16:27:25.95 |
-22:22:34.9 |
HIP 80632 |
14.33 |
| 2026-08-06 00:00 |
16:27:21.77 |
-22:22:16.0 |
HIP 80587 |
14.84 |
| 2026-08-06 12:00 |
16:27:17.73 |
-22:21:57.4 |
HIP 80587 |
14.43 |
| 2026-08-07 00:00 |
16:27:13.82 |
-22:21:39.1 |
HIP 80587 |
14.09 |
| 2026-08-07 12:00 |
16:27:10.05 |
-22:21:21.2 |
HIP 80587 |
13.81 |
| 2026-08-08 00:00 |
16:27:06.43 |
-22:21:03.5 |
HIP 80587 |
13.58 |
| 2026-08-08 12:00 |
16:27:02.94 |
-22:20:46.2 |
HIP 80587 |
13.41 |
| 2026-08-09 00:00 |
16:26:59.59 |
-22:20:29.1 |
HIP 80587 |
13.29 |
| 2026-08-09 12:00 |
16:26:56.38 |
-22:20:12.4 |
HIP 80587 |
13.22 |
| 2026-08-10 00:00 |
16:26:53.31 |
-22:19:56.0 |
HIP 80587 |
13.19 |
| 2026-08-10 12:00 |
16:26:50.39 |
-22:19:39.9 |
HIP 80587 |
13.19 |
| 2026-08-11 00:00 |
16:26:47.60 |
-22:19:24.1 |
HIP 80587 |
13.23 |
| 2026-08-11 12:00 |
16:26:44.95 |
-22:19:08.7 |
HIP 80587 |
13.28 |
| 2026-08-12 00:00 |
16:26:42.45 |
-22:18:53.6 |
HIP 80587 |
13.36 |
| 2026-08-12 12:00 |
16:26:40.08 |
-22:18:38.7 |
HIP 80587 |
13.46 |
| 2026-08-13 00:00 |
16:26:37.86 |
-22:18:24.3 |
HIP 80587 |
13.56 |
| 2026-08-13 12:00 |
16:26:35.78 |
-22:18:10.1 |
HIP 80587 |
13.67 |
| 2026-08-14 00:00 |
16:26:33.84 |
-22:17:56.2 |
HIP 80587 |
13.79 |
| 2026-08-14 12:00 |
16:26:32.04 |
-22:17:42.7 |
HIP 80587 |
13.90 |
| 2026-08-15 00:00 |
16:26:30.38 |
-22:17:29.5 |
HIP 80587 |
14.01 |
| 2026-08-15 12:00 |
16:26:28.86 |
-22:17:16.6 |
HIP 80587 |
14.11 |
| 2026-08-16 00:00 |
16:26:27.48 |
-22:17:04.1 |
HIP 80587 |
14.20 |
| 2026-08-16 12:00 |
16:26:26.25 |
-22:16:51.8 |
HIP 80587 |
14.28 |
| 2026-08-17 00:00 |
16:26:25.15 |
-22:16:39.9 |
HIP 80587 |
14.35 |
| 2026-08-17 12:00 |
16:26:24.20 |
-22:16:28.4 |
HIP 80587 |
14.40 |
| 2026-08-18 00:00 |
16:26:23.38 |
-22:16:17.1 |
HIP 80587 |
14.43 |
| 2026-08-18 12:00 |
16:26:22.71 |
-22:16:06.2 |
HIP 80587 |
14.45 |
| 2026-08-19 00:00 |
16:26:22.18 |
-22:15:55.6 |
HIP 80587 |
14.45 |