메타데이터
| 항목 |
값 |
| Designation |
477P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-10-09T11:21:47.885760Z |
| Orbit solution date (soln_date, UTC) |
2024-04-13T16:43:16Z |
| Obs used |
320 |
| NEO |
- |
| M1 |
7.800 |
| K1 |
40.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2018-08-08T13:03:54.432000Z |
| Discovery magnitude (MPC) |
21.00 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2019-04-04.0000000 |
| e |
0.41596154 |
| q (au) |
1.756419 |
| a (au) |
3.007369 |
| i (deg) |
8.909359 |
| Ω (om, deg) |
59.208728 |
| ω (w, deg) |
305.889989 |
| M (ma, deg) |
33.360615 |
밝기
산란 + 전체 선형
$$
M_a = (15.556 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.556 |
| 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) |
| 2026-09-20 00:00 |
12:34:42.61 |
+02:16:32.7 |
HIP 61428 |
8.39 |
| 2026-09-20 12:00 |
12:35:10.26 |
+02:13:15.5 |
HIP 61428 |
2.79 |
| 2026-09-21 00:00 |
12:35:37.92 |
+02:09:58.5 |
HIP 61428 |
7.88 |
| 2026-09-21 12:00 |
12:36:05.61 |
+02:06:41.5 |
HIP 61428 |
15.29 |
| 2026-09-22 00:00 |
12:36:33.32 |
+02:03:24.7 |
HIP 61428 |
22.86 |
| 2026-09-22 12:00 |
12:37:01.05 |
+02:00:07.9 |
HIP 61643 |
18.03 |
| 2026-09-23 00:00 |
12:37:28.80 |
+01:56:51.3 |
HIP 61643 |
11.22 |
| 2026-09-23 12:00 |
12:37:56.58 |
+01:53:34.9 |
HIP 61643 |
6.64 |
| 2026-09-24 00:00 |
12:38:24.37 |
+01:50:18.5 |
HIP 61658 |
1.09 |
| 2026-09-24 12:00 |
12:38:52.19 |
+01:47:02.3 |
HIP 61658 |
8.56 |
| 2026-09-25 00:00 |
12:39:20.02 |
+01:43:46.2 |
HIP 61658 |
16.23 |
| 2026-09-25 12:00 |
12:39:47.88 |
+01:40:30.2 |
HIP 61658 |
23.91 |
| 2026-09-26 00:00 |
12:40:15.75 |
+01:37:14.4 |
HIP 61865 |
20.47 |
| 2026-09-26 12:00 |
12:40:43.64 |
+01:33:58.8 |
HIP 61865 |
16.07 |
| 2026-09-27 00:00 |
12:41:11.56 |
+01:30:43.2 |
HIP 61865 |
14.71 |
| 2026-09-27 12:00 |
12:41:39.48 |
+01:27:27.9 |
HIP 62005 |
14.62 |
| 2026-09-28 00:00 |
12:42:07.43 |
+01:24:12.7 |
HIP 62005 |
7.03 |
| 2026-09-28 12:00 |
12:42:35.39 |
+01:20:57.6 |
HIP 62005 |
1.97 |
| 2026-09-29 00:00 |
12:43:03.37 |
+01:17:42.7 |
HIP 62005 |
8.79 |
| 2026-09-29 12:00 |
12:43:31.36 |
+01:14:28.0 |
HIP 62005 |
16.42 |
| 2026-09-30 00:00 |
12:43:59.37 |
+01:11:13.4 |
HIP 62235 |
21.46 |
| 2026-09-30 12:00 |
12:44:27.40 |
+01:07:59.0 |
HIP 62235 |
13.76 |
| 2026-10-01 00:00 |
12:44:55.44 |
+01:04:44.8 |
HIP 62235 |
6.11 |
| 2026-10-01 12:00 |
12:45:23.49 |
+01:01:30.7 |
HIP 62235 |
2.13 |
| 2026-10-02 00:00 |
12:45:51.56 |
+00:58:16.9 |
HIP 62265 |
4.61 |
| 2026-10-02 12:00 |
12:46:19.65 |
+00:55:03.2 |
HIP 62265 |
12.26 |
| 2026-10-03 00:00 |
12:46:47.74 |
+00:51:49.7 |
HIP 62265 |
19.97 |
| 2026-10-03 12:00 |
12:47:15.85 |
+00:48:36.4 |
HIP 62417 |
22.58 |
| 2026-10-04 00:00 |
12:47:43.97 |
+00:45:23.3 |
HIP 62417 |
19.35 |
| 2026-10-04 12:00 |
12:48:12.10 |
+00:42:10.4 |
HIP 62417 |
18.94 |
| 2026-10-05 00:00 |
12:48:40.24 |
+00:38:57.7 |
HIP 62633 |
20.60 |
| 2026-10-05 12:00 |
12:49:08.40 |
+00:35:45.2 |
HIP 62633 |
14.17 |
| 2026-10-06 00:00 |
12:49:36.56 |
+00:32:33.0 |
HIP 62633 |
9.84 |
| 2026-10-06 12:00 |
12:50:04.73 |
+00:29:20.9 |
HIP 62633 |
10.60 |
| 2026-10-07 00:00 |
12:50:32.91 |
+00:26:09.1 |
HIP 62633 |
15.74 |
| 2026-10-07 12:00 |
12:51:01.10 |
+00:22:57.5 |
HIP 62759 |
11.69 |
| 2026-10-08 00:00 |
12:51:29.30 |
+00:19:46.2 |
HIP 62759 |
10.30 |
| 2026-10-08 12:00 |
12:51:57.50 |
+00:16:35.1 |
HIP 62776 |
11.56 |
| 2026-10-09 00:00 |
12:52:25.71 |
+00:13:24.2 |
HIP 62776 |
11.83 |
| 2026-10-09 12:00 |
12:52:53.93 |
+00:10:13.6 |
HIP 62776 |
16.31 |
| 2026-10-10 00:00 |
12:53:22.15 |
+00:07:03.3 |
HIP 62776 |
22.63 |
| 2026-10-10 12:00 |
12:53:50.37 |
+00:03:53.2 |
HIP 63093 |
27.02 |
| 2026-10-11 00:00 |
12:54:18.60 |
+00:00:43.4 |
HIP 63093 |
20.12 |