메타데이터
| 항목 |
값 |
| Designation |
C/2021 P1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-06-01T16:41:49.732800Z |
| Orbit solution date (soln_date, UTC) |
2024-03-19T12:12:38Z |
| Obs used |
104 |
| NEO |
- |
| M1 |
12.700 |
| K1 |
7.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2021-08-04T13:25:21.792000Z |
| Discovery magnitude (MPC) |
21.20 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2021-09-13.0000000 |
| e |
1.00024450 |
| q (au) |
4.374954 |
| a (au) |
-17893.332037 |
| i (deg) |
51.622012 |
| Ω (om, deg) |
359.671523 |
| ω (w, deg) |
40.363907 |
| M (ma, deg) |
-0.000108 |
밝기
산란 + 전체 선형
$$
M_a = (17.879 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
17.879 |
| n |
2.000 |
| gf |
0.999 |
| gb |
-0.791 |
| 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) |
| 2026-05-12 00:00 |
10:53:44.42 |
+37:56:59.1 |
HIP 53299 |
14.86 |
| 2026-05-12 12:00 |
10:53:41.51 |
+37:55:21.3 |
HIP 53299 |
13.48 |
| 2026-05-13 00:00 |
10:53:38.70 |
+37:53:43.0 |
HIP 53299 |
12.18 |
| 2026-05-13 12:00 |
10:53:35.99 |
+37:52:04.2 |
HIP 53299 |
10.97 |
| 2026-05-14 00:00 |
10:53:33.39 |
+37:50:24.9 |
HIP 53299 |
9.91 |
| 2026-05-14 12:00 |
10:53:30.90 |
+37:48:45.1 |
HIP 53299 |
9.03 |
| 2026-05-15 00:00 |
10:53:28.52 |
+37:47:04.9 |
HIP 53299 |
8.40 |
| 2026-05-15 12:00 |
10:53:26.23 |
+37:45:24.3 |
HIP 53299 |
8.08 |
| 2026-05-16 00:00 |
10:53:24.06 |
+37:43:43.2 |
HIP 53299 |
8.11 |
| 2026-05-16 12:00 |
10:53:21.99 |
+37:42:01.6 |
HIP 53299 |
8.48 |
| 2026-05-17 00:00 |
10:53:20.03 |
+37:40:19.6 |
HIP 53299 |
9.15 |
| 2026-05-17 12:00 |
10:53:18.17 |
+37:38:37.2 |
HIP 53299 |
10.06 |
| 2026-05-18 00:00 |
10:53:16.42 |
+37:36:54.3 |
HIP 53299 |
11.17 |
| 2026-05-18 12:00 |
10:53:14.77 |
+37:35:11.1 |
HIP 53299 |
12.41 |
| 2026-05-19 00:00 |
10:53:13.22 |
+37:33:27.4 |
HIP 53299 |
13.75 |
| 2026-05-19 12:00 |
10:53:11.78 |
+37:31:43.3 |
HIP 53299 |
15.16 |
| 2026-05-20 00:00 |
10:53:10.45 |
+37:29:58.8 |
HIP 53299 |
16.63 |
| 2026-05-20 12:00 |
10:53:09.22 |
+37:28:14.0 |
HIP 53299 |
18.15 |
| 2026-05-21 00:00 |
10:53:08.09 |
+37:26:28.7 |
HIP 53299 |
19.70 |
| 2026-05-21 12:00 |
10:53:07.07 |
+37:24:43.1 |
HIP 53299 |
21.28 |
| 2026-05-22 00:00 |
10:53:06.15 |
+37:22:57.1 |
HIP 53299 |
22.89 |
| 2026-05-22 12:00 |
10:53:05.33 |
+37:21:10.8 |
HIP 53299 |
24.51 |
| 2026-05-23 00:00 |
10:53:04.62 |
+37:19:24.1 |
HIP 53299 |
26.15 |
| 2026-05-23 12:00 |
10:53:04.00 |
+37:17:37.0 |
HIP 53299 |
27.80 |
| 2026-05-24 00:00 |
10:53:03.49 |
+37:15:49.6 |
HIP 53299 |
29.47 |
| 2026-05-24 12:00 |
10:53:03.08 |
+37:14:01.9 |
HIP 53299 |
31.15 |
| 2026-05-25 00:00 |
10:53:02.78 |
+37:12:13.8 |
HIP 53073 |
31.29 |
| 2026-05-25 12:00 |
10:53:02.57 |
+37:10:25.4 |
HIP 53073 |
29.83 |
| 2026-05-26 00:00 |
10:53:02.46 |
+37:08:36.7 |
HIP 53073 |
28.42 |
| 2026-05-26 12:00 |
10:53:02.46 |
+37:06:47.7 |
HIP 53073 |
27.07 |
| 2026-05-27 00:00 |
10:53:02.55 |
+37:04:58.3 |
HIP 53216 |
25.75 |
| 2026-05-27 12:00 |
10:53:02.75 |
+37:03:08.7 |
HIP 53216 |
23.92 |
| 2026-05-28 00:00 |
10:53:03.04 |
+37:01:18.8 |
HIP 53216 |
22.09 |
| 2026-05-28 12:00 |
10:53:03.43 |
+36:59:28.5 |
HIP 53216 |
20.25 |
| 2026-05-29 00:00 |
10:53:03.92 |
+36:57:38.0 |
HIP 53216 |
18.41 |
| 2026-05-29 12:00 |
10:53:04.51 |
+36:55:47.3 |
HIP 53216 |
16.57 |
| 2026-05-30 00:00 |
10:53:05.19 |
+36:53:56.2 |
HIP 53216 |
14.72 |
| 2026-05-30 12:00 |
10:53:05.98 |
+36:52:04.9 |
HIP 53216 |
12.87 |
| 2026-05-31 00:00 |
10:53:06.86 |
+36:50:13.3 |
HIP 53216 |
11.02 |
| 2026-05-31 12:00 |
10:53:07.83 |
+36:48:21.4 |
HIP 53216 |
9.17 |
| 2026-06-01 00:00 |
10:53:08.91 |
+36:46:29.3 |
HIP 53216 |
7.34 |
| 2026-06-01 12:00 |
10:53:10.08 |
+36:44:37.0 |
HIP 53216 |
5.54 |
| 2026-06-02 00:00 |
10:53:11.34 |
+36:42:44.4 |
HIP 53216 |
3.83 |