메타데이터
| 항목 |
값 |
| Designation |
P/2022 P2 (ZTF) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-07-10T18:54:03.015360Z |
| Orbit solution date (soln_date, UTC) |
2026-03-07T11:43:02Z |
| Obs used |
162 |
| NEO |
- |
| M1 |
9.200 |
| K1 |
21.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-08-15T12:02:27.830400Z |
| Discovery magnitude (MPC) |
18.50 r |
| Discovery observatory (MPC) |
I41 · Palomar Mountain–ZTF |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2022-10-22.0000000 |
| e |
0.55792224 |
| q (au) |
1.982270 |
| a (au) |
4.483984 |
| i (deg) |
12.442878 |
| Ω (om, deg) |
291.231134 |
| ω (w, deg) |
137.589908 |
| M (ma, deg) |
10.713716 |
밝기
산란 + 전체 선형
$$
M_a = (11.155 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.155 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
1.000 |
| 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 |
15:33:11.97 |
-31:20:22.4 |
HIP 76084 |
16.19 |
| 2026-05-12 12:00 |
15:32:55.27 |
-31:19:26.5 |
HIP 76084 |
13.22 |
| 2026-05-13 00:00 |
15:32:38.57 |
-31:18:29.9 |
HIP 76084 |
10.69 |
| 2026-05-13 12:00 |
15:32:21.86 |
-31:17:32.6 |
HIP 76084 |
8.99 |
| 2026-05-14 00:00 |
15:32:05.14 |
-31:16:34.6 |
HIP 76084 |
8.63 |
| 2026-05-14 12:00 |
15:31:48.41 |
-31:15:35.8 |
HIP 76084 |
9.78 |
| 2026-05-15 00:00 |
15:31:31.68 |
-31:14:36.3 |
HIP 76084 |
12.00 |
| 2026-05-15 12:00 |
15:31:14.95 |
-31:13:36.2 |
HIP 76084 |
14.83 |
| 2026-05-16 00:00 |
15:30:58.22 |
-31:12:35.3 |
HIP 76084 |
17.98 |
| 2026-05-16 12:00 |
15:30:41.50 |
-31:11:33.8 |
HIP 76084 |
21.31 |
| 2026-05-17 00:00 |
15:30:24.78 |
-31:10:31.6 |
HIP 75769 |
22.68 |
| 2026-05-17 12:00 |
15:30:08.08 |
-31:09:28.8 |
HIP 75769 |
19.74 |
| 2026-05-18 00:00 |
15:29:51.38 |
-31:08:25.3 |
HIP 75769 |
17.10 |
| 2026-05-18 12:00 |
15:29:34.70 |
-31:07:21.1 |
HIP 75769 |
14.94 |
| 2026-05-19 00:00 |
15:29:18.04 |
-31:06:16.3 |
HIP 75769 |
13.50 |
| 2026-05-19 12:00 |
15:29:01.40 |
-31:05:10.9 |
HIP 75769 |
13.00 |
| 2026-05-20 00:00 |
15:28:44.78 |
-31:04:04.8 |
HIP 75769 |
13.56 |
| 2026-05-20 12:00 |
15:28:28.19 |
-31:02:58.2 |
HIP 75769 |
15.06 |
| 2026-05-21 00:00 |
15:28:11.62 |
-31:01:50.9 |
HIP 75769 |
17.25 |
| 2026-05-21 12:00 |
15:27:55.08 |
-31:00:43.1 |
HIP 75769 |
19.90 |
| 2026-05-22 00:00 |
15:27:38.57 |
-30:59:34.6 |
HIP 75769 |
22.86 |
| 2026-05-22 12:00 |
15:27:22.10 |
-30:58:25.6 |
HIP 75769 |
26.01 |
| 2026-05-23 00:00 |
15:27:05.66 |
-30:57:16.0 |
HIP 75769 |
29.29 |
| 2026-05-23 12:00 |
15:26:49.26 |
-30:56:05.9 |
HIP 75503 |
28.41 |
| 2026-05-24 00:00 |
15:26:32.90 |
-30:54:55.3 |
HIP 75503 |
25.26 |
| 2026-05-24 12:00 |
15:26:16.59 |
-30:53:44.1 |
HIP 75503 |
22.27 |
| 2026-05-25 00:00 |
15:26:00.32 |
-30:52:32.3 |
HIP 75503 |
19.52 |
| 2026-05-25 12:00 |
15:25:44.10 |
-30:51:20.1 |
HIP 75503 |
17.13 |
| 2026-05-26 00:00 |
15:25:27.92 |
-30:50:07.4 |
HIP 75503 |
15.25 |
| 2026-05-26 12:00 |
15:25:11.80 |
-30:48:54.1 |
HIP 75503 |
14.09 |
| 2026-05-27 00:00 |
15:24:55.73 |
-30:47:40.4 |
HIP 75503 |
13.83 |
| 2026-05-27 12:00 |
15:24:39.72 |
-30:46:26.2 |
HIP 75503 |
14.51 |
| 2026-05-28 00:00 |
15:24:23.77 |
-30:45:11.6 |
HIP 75503 |
16.01 |
| 2026-05-28 12:00 |
15:24:07.87 |
-30:43:56.5 |
HIP 75503 |
18.11 |
| 2026-05-29 00:00 |
15:23:52.04 |
-30:42:40.9 |
HIP 75503 |
20.63 |
| 2026-05-29 12:00 |
15:23:36.27 |
-30:41:24.9 |
HIP 75276 |
20.27 |
| 2026-05-30 00:00 |
15:23:20.56 |
-30:40:08.5 |
HIP 75276 |
17.54 |
| 2026-05-30 12:00 |
15:23:04.92 |
-30:38:51.7 |
HIP 75276 |
15.17 |
| 2026-05-31 00:00 |
15:22:49.36 |
-30:37:34.5 |
HIP 75276 |
13.37 |
| 2026-05-31 12:00 |
15:22:33.86 |
-30:36:16.9 |
HIP 75276 |
12.35 |
| 2026-06-01 00:00 |
15:22:18.44 |
-30:34:58.9 |
HIP 75276 |
12.32 |
| 2026-06-01 12:00 |
15:22:03.09 |
-30:33:40.6 |
HIP 75276 |
13.27 |
| 2026-06-02 00:00 |
15:21:47.82 |
-30:32:21.9 |
HIP 75276 |
15.01 |