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 |
1.000 |
| 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) |
| 2026-09-20 00:00 |
11:22:18.03 |
+30:17:52.3 |
HIP 55362 |
29.40 |
| 2026-09-20 12:00 |
11:22:28.45 |
+30:16:42.3 |
HIP 55362 |
31.14 |
| 2026-09-21 00:00 |
11:22:38.86 |
+30:15:32.9 |
HIP 55362 |
32.98 |
| 2026-09-21 12:00 |
11:22:49.24 |
+30:14:24.0 |
HIP 55362 |
34.91 |
| 2026-09-22 00:00 |
11:22:59.61 |
+30:13:15.6 |
HIP 55362 |
36.90 |
| 2026-09-22 12:00 |
11:23:09.97 |
+30:12:07.7 |
HIP 55766 |
34.56 |
| 2026-09-23 00:00 |
11:23:20.30 |
+30:11:00.4 |
HIP 55766 |
32.08 |
| 2026-09-23 12:00 |
11:23:30.62 |
+30:09:53.6 |
HIP 55766 |
29.59 |
| 2026-09-24 00:00 |
11:23:40.92 |
+30:08:47.3 |
HIP 55766 |
27.12 |
| 2026-09-24 12:00 |
11:23:51.20 |
+30:07:41.6 |
HIP 55766 |
24.66 |
| 2026-09-25 00:00 |
11:24:01.46 |
+30:06:36.4 |
HIP 55766 |
22.20 |
| 2026-09-25 12:00 |
11:24:11.70 |
+30:05:31.7 |
HIP 55766 |
19.76 |
| 2026-09-26 00:00 |
11:24:21.92 |
+30:04:27.6 |
HIP 55766 |
17.32 |
| 2026-09-26 12:00 |
11:24:32.12 |
+30:03:24.1 |
HIP 55766 |
14.91 |
| 2026-09-27 00:00 |
11:24:42.29 |
+30:02:21.0 |
HIP 55766 |
12.50 |
| 2026-09-27 12:00 |
11:24:52.45 |
+30:01:18.6 |
HIP 55766 |
10.13 |
| 2026-09-28 00:00 |
11:25:02.58 |
+30:00:16.6 |
HIP 55766 |
7.79 |
| 2026-09-28 12:00 |
11:25:12.69 |
+29:59:15.2 |
HIP 55766 |
5.53 |
| 2026-09-29 00:00 |
11:25:22.78 |
+29:58:14.4 |
HIP 55766 |
3.49 |
| 2026-09-29 12:00 |
11:25:32.85 |
+29:57:14.1 |
HIP 55766 |
2.32 |
| 2026-09-30 00:00 |
11:25:42.89 |
+29:56:14.4 |
HIP 55766 |
3.16 |
| 2026-09-30 12:00 |
11:25:52.90 |
+29:55:15.2 |
HIP 55766 |
5.10 |
| 2026-10-01 00:00 |
11:26:02.89 |
+29:54:16.6 |
HIP 55766 |
7.29 |
| 2026-10-01 12:00 |
11:26:12.86 |
+29:53:18.6 |
HIP 55766 |
9.56 |
| 2026-10-02 00:00 |
11:26:22.80 |
+29:52:21.1 |
HIP 55766 |
11.86 |
| 2026-10-02 12:00 |
11:26:32.71 |
+29:51:24.2 |
HIP 55766 |
14.17 |
| 2026-10-03 00:00 |
11:26:42.60 |
+29:50:27.9 |
HIP 55927 |
13.04 |
| 2026-10-03 12:00 |
11:26:52.45 |
+29:49:32.1 |
HIP 55927 |
10.86 |
| 2026-10-04 00:00 |
11:27:02.28 |
+29:48:36.9 |
HIP 55927 |
8.77 |
| 2026-10-04 12:00 |
11:27:12.09 |
+29:47:42.3 |
HIP 55927 |
6.82 |
| 2026-10-05 00:00 |
11:27:21.86 |
+29:46:48.3 |
HIP 55927 |
5.20 |
| 2026-10-05 12:00 |
11:27:31.60 |
+29:45:54.8 |
HIP 55927 |
4.24 |
| 2026-10-06 00:00 |
11:27:41.31 |
+29:45:02.0 |
HIP 55927 |
4.40 |
| 2026-10-06 12:00 |
11:27:51.00 |
+29:44:09.7 |
HIP 55927 |
5.58 |
| 2026-10-07 00:00 |
11:28:00.65 |
+29:43:18.0 |
HIP 55927 |
7.28 |
| 2026-10-07 12:00 |
11:28:10.27 |
+29:42:26.9 |
HIP 55927 |
9.22 |
| 2026-10-08 00:00 |
11:28:19.85 |
+29:41:36.4 |
HIP 55927 |
11.26 |
| 2026-10-08 12:00 |
11:28:29.41 |
+29:40:46.5 |
HIP 55927 |
13.36 |
| 2026-10-09 00:00 |
11:28:38.93 |
+29:39:57.2 |
HIP 55927 |
15.48 |
| 2026-10-09 12:00 |
11:28:48.41 |
+29:39:08.5 |
HIP 55927 |
17.62 |
| 2026-10-10 00:00 |
11:28:57.86 |
+29:38:20.4 |
HIP 55927 |
19.76 |
| 2026-10-10 12:00 |
11:29:07.28 |
+29:37:32.9 |
HIP 55927 |
21.90 |
| 2026-10-11 00:00 |
11:29:16.66 |
+29:36:46.0 |
HIP 56109 |
23.54 |