메타데이터
| 항목 |
값 |
| Designation |
381P/LINEAR-Spacewatch |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-09-29T17:41:23.599680Z |
| Orbit solution date (soln_date, UTC) |
2021-05-02T23:43:03Z |
| Obs used |
175 |
| NEO |
- |
| M1 |
13.600 |
| K1 |
14.500 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-05-29T13:47:59.136000Z |
| Discovery magnitude (MPC) |
21.60 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-07-10.0000000 |
| e |
0.67945045 |
| q (au) |
2.283195 |
| a (au) |
7.122754 |
| i (deg) |
28.462310 |
| Ω (om, deg) |
174.108452 |
| ω (w, deg) |
172.544217 |
| M (ma, deg) |
280.012136 |
밝기
산란 + 전체 선형
$$
M_a = (16.792 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
16.792 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.831 |
| k |
0.996 |
| 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) |
| 2026-05-12 00:00 |
09:51:46.26 |
+02:04:01.4 |
HIP 48276 |
23.67 |
| 2026-05-12 12:00 |
09:51:47.28 |
+02:04:38.6 |
HIP 48414 |
23.44 |
| 2026-05-13 00:00 |
09:51:48.39 |
+02:05:15.4 |
HIP 48414 |
22.77 |
| 2026-05-13 12:00 |
09:51:49.58 |
+02:05:51.7 |
HIP 48414 |
22.11 |
| 2026-05-14 00:00 |
09:51:50.85 |
+02:06:27.5 |
HIP 48414 |
21.45 |
| 2026-05-14 12:00 |
09:51:52.21 |
+02:07:02.8 |
HIP 48414 |
20.80 |
| 2026-05-15 00:00 |
09:51:53.65 |
+02:07:37.6 |
HIP 48414 |
20.15 |
| 2026-05-15 12:00 |
09:51:55.17 |
+02:08:11.9 |
HIP 48414 |
19.51 |
| 2026-05-16 00:00 |
09:51:56.77 |
+02:08:45.7 |
HIP 48414 |
18.87 |
| 2026-05-16 12:00 |
09:51:58.46 |
+02:09:19.0 |
HIP 48414 |
18.25 |
| 2026-05-17 00:00 |
09:52:00.23 |
+02:09:51.9 |
HIP 48414 |
17.63 |
| 2026-05-17 12:00 |
09:52:02.08 |
+02:10:24.2 |
HIP 48414 |
17.02 |
| 2026-05-18 00:00 |
09:52:04.01 |
+02:10:56.0 |
HIP 48414 |
16.43 |
| 2026-05-18 12:00 |
09:52:06.03 |
+02:11:27.3 |
HIP 48414 |
15.86 |
| 2026-05-19 00:00 |
09:52:08.12 |
+02:11:58.1 |
HIP 48414 |
15.30 |
| 2026-05-19 12:00 |
09:52:10.30 |
+02:12:28.4 |
HIP 48414 |
14.77 |
| 2026-05-20 00:00 |
09:52:12.56 |
+02:12:58.2 |
HIP 48414 |
14.26 |
| 2026-05-20 12:00 |
09:52:14.90 |
+02:13:27.4 |
HIP 48414 |
13.79 |
| 2026-05-21 00:00 |
09:52:17.31 |
+02:13:56.2 |
HIP 48414 |
13.36 |
| 2026-05-21 12:00 |
09:52:19.81 |
+02:14:24.5 |
HIP 48414 |
12.96 |
| 2026-05-22 00:00 |
09:52:22.39 |
+02:14:52.2 |
HIP 48414 |
12.62 |
| 2026-05-22 12:00 |
09:52:25.05 |
+02:15:19.5 |
HIP 48414 |
12.33 |
| 2026-05-23 00:00 |
09:52:27.78 |
+02:15:46.2 |
HIP 48414 |
12.10 |
| 2026-05-23 12:00 |
09:52:30.60 |
+02:16:12.5 |
HIP 48414 |
11.94 |
| 2026-05-24 00:00 |
09:52:33.49 |
+02:16:38.2 |
HIP 48414 |
11.85 |
| 2026-05-24 12:00 |
09:52:36.46 |
+02:17:03.4 |
HIP 48414 |
11.83 |
| 2026-05-25 00:00 |
09:52:39.51 |
+02:17:28.2 |
HIP 48414 |
11.90 |
| 2026-05-25 12:00 |
09:52:42.63 |
+02:17:52.4 |
HIP 48414 |
12.05 |
| 2026-05-26 00:00 |
09:52:45.83 |
+02:18:16.1 |
HIP 48414 |
12.27 |
| 2026-05-26 12:00 |
09:52:49.11 |
+02:18:39.3 |
HIP 48414 |
12.58 |
| 2026-05-27 00:00 |
09:52:52.47 |
+02:19:02.0 |
HIP 48414 |
12.96 |
| 2026-05-27 12:00 |
09:52:55.90 |
+02:19:24.2 |
HIP 48414 |
13.42 |
| 2026-05-28 00:00 |
09:52:59.40 |
+02:19:45.8 |
HIP 48414 |
13.94 |
| 2026-05-28 12:00 |
09:53:02.98 |
+02:20:07.0 |
HIP 48414 |
14.53 |
| 2026-05-29 00:00 |
09:53:06.64 |
+02:20:27.7 |
HIP 48414 |
15.18 |
| 2026-05-29 12:00 |
09:53:10.37 |
+02:20:47.8 |
HIP 48414 |
15.88 |
| 2026-05-30 00:00 |
09:53:14.18 |
+02:21:07.5 |
HIP 48414 |
16.63 |
| 2026-05-30 12:00 |
09:53:18.06 |
+02:21:26.6 |
HIP 48414 |
17.42 |
| 2026-05-31 00:00 |
09:53:22.01 |
+02:21:45.3 |
HIP 48414 |
18.26 |
| 2026-05-31 12:00 |
09:53:26.04 |
+02:22:03.4 |
HIP 48503 |
18.62 |
| 2026-06-01 00:00 |
09:53:30.14 |
+02:22:21.1 |
HIP 48503 |
18.91 |
| 2026-06-01 12:00 |
09:53:34.31 |
+02:22:38.2 |
HIP 48503 |
19.25 |
| 2026-06-02 00:00 |
09:53:38.55 |
+02:22:54.8 |
HIP 48503 |
19.64 |