메타데이터
| 항목 |
값 |
| Designation |
379P/Spacewatch |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-12-13T20:29:59.527680Z |
| Orbit solution date (soln_date, UTC) |
2026-04-27T13:42:35Z |
| Obs used |
123 |
| NEO |
- |
| M1 |
14.800 |
| K1 |
9.750 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-02-28T09:07:17.184000Z |
| Discovery magnitude (MPC) |
20.10 G |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-10-20.0000000 |
| e |
0.33732748 |
| q (au) |
2.338693 |
| a (au) |
3.529183 |
| i (deg) |
12.384521 |
| Ω (om, deg) |
184.040277 |
| ω (w, deg) |
31.020530 |
| M (ma, deg) |
154.627610 |
밝기
산란 + 전체 선형
$$
M_a = (18.663 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
18.663 |
| n |
2.000 |
| gf |
0.955 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
16:34:33.80 |
-03:49:30.7 |
HIP 81111 |
9.15 |
| 2026-05-12 12:00 |
16:34:17.27 |
-03:45:51.5 |
HIP 81111 |
5.03 |
| 2026-05-13 00:00 |
16:34:00.51 |
-03:42:14.6 |
HIP 81111 |
5.21 |
| 2026-05-13 12:00 |
16:33:43.53 |
-03:38:40.0 |
HIP 81111 |
9.47 |
| 2026-05-14 00:00 |
16:33:26.32 |
-03:35:07.7 |
HIP 81111 |
14.62 |
| 2026-05-14 12:00 |
16:33:08.90 |
-03:31:37.9 |
HIP 81111 |
19.99 |
| 2026-05-15 00:00 |
16:32:51.28 |
-03:28:10.6 |
HIP 81111 |
25.45 |
| 2026-05-15 12:00 |
16:32:33.46 |
-03:24:45.8 |
HIP 81111 |
30.96 |
| 2026-05-16 00:00 |
16:32:15.45 |
-03:21:23.6 |
HIP 80864 |
29.85 |
| 2026-05-16 12:00 |
16:31:57.26 |
-03:18:03.9 |
HIP 80864 |
29.08 |
| 2026-05-17 00:00 |
16:31:38.90 |
-03:14:47.0 |
HIP 80864 |
29.32 |
| 2026-05-17 12:00 |
16:31:20.37 |
-03:11:32.8 |
HIP 80864 |
30.56 |
| 2026-05-18 00:00 |
16:31:01.69 |
-03:08:21.3 |
HIP 80864 |
32.69 |
| 2026-05-18 12:00 |
16:30:42.86 |
-03:05:12.7 |
HIP 80864 |
35.55 |
| 2026-05-19 00:00 |
16:30:23.89 |
-03:02:06.9 |
HIP 80864 |
38.98 |
| 2026-05-19 12:00 |
16:30:04.79 |
-02:59:04.0 |
HIP 80872 |
42.26 |
| 2026-05-20 00:00 |
16:29:45.57 |
-02:56:04.1 |
HIP 80872 |
40.98 |
| 2026-05-20 12:00 |
16:29:26.24 |
-02:53:07.1 |
HIP 80694 |
36.88 |
| 2026-05-21 00:00 |
16:29:06.80 |
-02:50:13.1 |
HIP 80694 |
32.65 |
| 2026-05-21 12:00 |
16:28:47.26 |
-02:47:22.2 |
HIP 80694 |
28.95 |
| 2026-05-22 00:00 |
16:28:27.63 |
-02:44:34.4 |
HIP 80694 |
26.02 |
| 2026-05-22 12:00 |
16:28:07.93 |
-02:41:49.7 |
HIP 80694 |
24.13 |
| 2026-05-23 00:00 |
16:27:48.15 |
-02:39:08.1 |
HIP 80694 |
23.53 |
| 2026-05-23 12:00 |
16:27:28.31 |
-02:36:29.7 |
HIP 80694 |
24.31 |
| 2026-05-24 00:00 |
16:27:08.42 |
-02:33:54.5 |
HIP 80694 |
26.33 |
| 2026-05-24 12:00 |
16:26:48.48 |
-02:31:22.6 |
HIP 80694 |
29.33 |
| 2026-05-25 00:00 |
16:26:28.50 |
-02:28:53.9 |
HIP 80398 |
27.23 |
| 2026-05-25 12:00 |
16:26:08.48 |
-02:26:28.5 |
HIP 80398 |
22.41 |
| 2026-05-26 00:00 |
16:25:48.45 |
-02:24:06.5 |
HIP 80398 |
17.99 |
| 2026-05-26 12:00 |
16:25:28.40 |
-02:21:47.8 |
HIP 80398 |
14.33 |
| 2026-05-27 00:00 |
16:25:08.34 |
-02:19:32.4 |
HIP 80398 |
12.12 |
| 2026-05-27 12:00 |
16:24:48.29 |
-02:17:20.4 |
HIP 80398 |
12.14 |
| 2026-05-28 00:00 |
16:24:28.24 |
-02:15:11.9 |
HIP 80306 |
11.14 |
| 2026-05-28 12:00 |
16:24:08.21 |
-02:13:06.7 |
HIP 80306 |
6.72 |
| 2026-05-29 00:00 |
16:23:48.20 |
-02:11:05.1 |
HIP 80306 |
4.95 |
| 2026-05-29 12:00 |
16:23:28.22 |
-02:09:06.9 |
HIP 80306 |
7.82 |
| 2026-05-30 00:00 |
16:23:08.28 |
-02:07:12.1 |
HIP 80227 |
7.72 |
| 2026-05-30 12:00 |
16:22:48.39 |
-02:05:20.9 |
HIP 80227 |
2.43 |
| 2026-05-31 00:00 |
16:22:28.55 |
-02:03:33.2 |
HIP 80227 |
2.87 |
| 2026-05-31 12:00 |
16:22:08.78 |
-02:01:49.0 |
HIP 80227 |
8.09 |
| 2026-06-01 00:00 |
16:21:49.07 |
-02:00:08.4 |
HIP 80120 |
11.44 |
| 2026-06-01 12:00 |
16:21:29.44 |
-01:58:31.3 |
HIP 80120 |
7.16 |
| 2026-06-02 00:00 |
16:21:09.89 |
-01:56:57.8 |
HIP 80120 |
5.03 |