메타데이터
| 항목 |
값 |
| Designation |
380P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-06-06T22:55:01.165440Z |
| Orbit solution date (soln_date, UTC) |
2023-02-06T22:13:34Z |
| Obs used |
266 |
| NEO |
- |
| M1 |
7.600 |
| K1 |
20.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2011-07-27T11:29:39.984000Z |
| Discovery magnitude (MPC) |
22.90 G |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2018-10-25.0000000 |
| e |
0.32644250 |
| q (au) |
3.049709 |
| a (au) |
4.527763 |
| i (deg) |
8.234018 |
| Ω (om, deg) |
133.114129 |
| ω (w, deg) |
90.060499 |
| M (ma, deg) |
336.986963 |
밝기
산란 + 전체 선형
$$
M_a = (9.310 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.310 |
| n |
6.000 |
| gf |
0.906 |
| gb |
-0.918 |
| k |
1.000 |
| δ90 |
5.286 |
| 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 |
| 2018-01-16 |
2019-06-02 |
+10.1851 |
-5.046 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
07:49:23.27 |
+18:06:49.1 |
HIP 38135 |
8.40 |
| 2026-09-20 12:00 |
07:49:46.67 |
+18:05:53.7 |
HIP 38135 |
13.74 |
| 2026-09-21 00:00 |
07:50:09.95 |
+18:04:58.3 |
HIP 38135 |
19.23 |
| 2026-09-21 12:00 |
07:50:33.13 |
+18:04:02.9 |
HIP 38135 |
24.75 |
| 2026-09-22 00:00 |
07:50:56.19 |
+18:03:07.6 |
HIP 38135 |
30.26 |
| 2026-09-22 12:00 |
07:51:19.13 |
+18:02:12.5 |
HIP 38506 |
33.04 |
| 2026-09-23 00:00 |
07:51:41.96 |
+18:01:17.4 |
HIP 38506 |
28.37 |
| 2026-09-23 12:00 |
07:52:04.67 |
+18:00:22.3 |
HIP 38506 |
24.08 |
| 2026-09-24 00:00 |
07:52:27.26 |
+17:59:27.4 |
HIP 38506 |
20.37 |
| 2026-09-24 12:00 |
07:52:49.73 |
+17:58:32.6 |
HIP 38506 |
17.61 |
| 2026-09-25 00:00 |
07:53:12.09 |
+17:57:37.9 |
HIP 38506 |
16.26 |
| 2026-09-25 12:00 |
07:53:34.32 |
+17:56:43.3 |
HIP 38514 |
16.56 |
| 2026-09-26 00:00 |
07:53:56.43 |
+17:55:48.9 |
HIP 38661 |
14.17 |
| 2026-09-26 12:00 |
07:54:18.42 |
+17:54:54.5 |
HIP 38661 |
9.20 |
| 2026-09-27 00:00 |
07:54:40.29 |
+17:54:00.3 |
HIP 38661 |
5.01 |
| 2026-09-27 12:00 |
07:55:02.03 |
+17:53:06.3 |
HIP 38661 |
4.61 |
| 2026-09-28 00:00 |
07:55:23.65 |
+17:52:12.4 |
HIP 38661 |
8.49 |
| 2026-09-28 12:00 |
07:55:45.14 |
+17:51:18.6 |
HIP 38661 |
13.29 |
| 2026-09-29 00:00 |
07:56:06.50 |
+17:50:25.0 |
HIP 38661 |
18.27 |
| 2026-09-29 12:00 |
07:56:27.74 |
+17:49:31.6 |
HIP 38890 |
22.45 |
| 2026-09-30 00:00 |
07:56:48.84 |
+17:48:38.3 |
HIP 38935 |
18.47 |
| 2026-09-30 12:00 |
07:57:09.82 |
+17:47:45.2 |
HIP 38935 |
13.58 |
| 2026-10-01 00:00 |
07:57:30.66 |
+17:46:52.4 |
HIP 38935 |
8.91 |
| 2026-10-01 12:00 |
07:57:51.37 |
+17:45:59.7 |
HIP 38935 |
5.06 |
| 2026-10-02 00:00 |
07:58:11.95 |
+17:45:07.2 |
HIP 38935 |
4.66 |
| 2026-10-02 12:00 |
07:58:32.39 |
+17:44:14.9 |
HIP 38935 |
8.18 |
| 2026-10-03 00:00 |
07:58:52.69 |
+17:43:22.8 |
HIP 38935 |
12.66 |
| 2026-10-03 12:00 |
07:59:12.86 |
+17:42:31.0 |
HIP 38935 |
17.34 |
| 2026-10-04 00:00 |
07:59:32.89 |
+17:41:39.4 |
HIP 38935 |
22.08 |
| 2026-10-04 12:00 |
07:59:52.77 |
+17:40:48.1 |
HIP 39177 |
25.80 |
| 2026-10-05 00:00 |
08:00:12.52 |
+17:39:56.9 |
HIP 39177 |
22.98 |
| 2026-10-05 12:00 |
08:00:32.13 |
+17:39:06.1 |
HIP 39177 |
20.90 |
| 2026-10-06 00:00 |
08:00:51.59 |
+17:38:15.5 |
HIP 39177 |
19.76 |
| 2026-10-06 12:00 |
08:01:10.90 |
+17:37:25.2 |
HIP 39177 |
19.72 |
| 2026-10-07 00:00 |
08:01:30.07 |
+17:36:35.2 |
HIP 39177 |
20.74 |
| 2026-10-07 12:00 |
08:01:49.09 |
+17:35:45.4 |
HIP 39177 |
22.67 |
| 2026-10-08 00:00 |
08:02:07.96 |
+17:34:56.0 |
HIP 39434 |
23.57 |
| 2026-10-08 12:00 |
08:02:26.68 |
+17:34:06.8 |
HIP 39434 |
19.87 |
| 2026-10-09 00:00 |
08:02:45.25 |
+17:33:18.0 |
HIP 39434 |
16.60 |
| 2026-10-09 12:00 |
08:03:03.67 |
+17:32:29.5 |
HIP 39434 |
14.06 |
| 2026-10-10 00:00 |
08:03:21.94 |
+17:31:41.3 |
HIP 39434 |
12.63 |
| 2026-10-10 12:00 |
08:03:40.04 |
+17:30:53.5 |
HIP 39434 |
12.66 |
| 2026-10-11 00:00 |
08:03:58.00 |
+17:30:06.0 |
HIP 39434 |
14.12 |