메타데이터
| 항목 |
값 |
| Designation |
464P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-02-28T09:38:59.409600Z |
| Orbit solution date (soln_date, UTC) |
2024-08-18T18:42:26Z |
| Obs used |
175 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
17.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2014-07-25T10:20:03.840000Z |
| Discovery magnitude (MPC) |
21.50 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2022-06-17.0000000 |
| e |
0.28094023 |
| q (au) |
3.372325 |
| a (au) |
4.689909 |
| i (deg) |
21.665175 |
| Ω (om, deg) |
309.606244 |
| ω (w, deg) |
267.729176 |
| M (ma, deg) |
335.118359 |
밝기
산란 + 전체 선형
$$
M_a = (7.375 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
7.375 |
| n |
6.000 |
| gf |
0.997 |
| gb |
-0.502 |
| k |
1.000 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2022-01-09 |
2023-02-03 |
+34.8067 |
-18.081 |
| 2023-03-15 |
2024-08-06 |
+13.0591 |
-7.225 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
00:01:23.90 |
+20:25:33.7 |
HIP 118275 |
27.39 |
| 2026-07-29 12:00 |
00:01:17.89 |
+20:27:08.0 |
HIP 118275 |
26.07 |
| 2026-07-30 00:00 |
00:01:11.71 |
+20:28:41.0 |
HIP 118275 |
24.82 |
| 2026-07-30 12:00 |
00:01:05.36 |
+20:30:12.7 |
HIP 118275 |
23.65 |
| 2026-07-31 00:00 |
00:00:58.84 |
+20:31:43.2 |
HIP 118275 |
22.58 |
| 2026-07-31 12:00 |
00:00:52.15 |
+20:33:12.5 |
HIP 118275 |
21.62 |
| 2026-08-01 00:00 |
00:00:45.30 |
+20:34:40.4 |
HIP 118275 |
20.80 |
| 2026-08-01 12:00 |
00:00:38.28 |
+20:36:07.0 |
HIP 118275 |
20.14 |
| 2026-08-02 00:00 |
00:00:31.09 |
+20:37:32.3 |
HIP 118275 |
19.65 |
| 2026-08-02 12:00 |
00:00:23.73 |
+20:38:56.3 |
HIP 118275 |
19.36 |
| 2026-08-03 00:00 |
00:00:16.21 |
+20:40:19.0 |
HIP 118275 |
19.29 |
| 2026-08-03 12:00 |
00:00:08.52 |
+20:41:40.3 |
HIP 118275 |
19.43 |
| 2026-08-04 00:00 |
00:00:00.66 |
+20:43:00.3 |
HIP 118275 |
19.80 |
| 2026-08-04 12:00 |
23:59:52.64 |
+20:44:18.9 |
HIP 118275 |
20.38 |
| 2026-08-05 00:00 |
23:59:44.46 |
+20:45:36.2 |
HIP 118275 |
21.16 |
| 2026-08-05 12:00 |
23:59:36.11 |
+20:46:52.1 |
HIP 118167 |
19.97 |
| 2026-08-06 00:00 |
23:59:27.60 |
+20:48:06.6 |
HIP 118167 |
17.83 |
| 2026-08-06 12:00 |
23:59:18.92 |
+20:49:19.7 |
HIP 118167 |
15.71 |
| 2026-08-07 00:00 |
23:59:10.09 |
+20:50:31.5 |
HIP 118167 |
13.63 |
| 2026-08-07 12:00 |
23:59:01.09 |
+20:51:41.8 |
HIP 118167 |
11.64 |
| 2026-08-08 00:00 |
23:58:51.94 |
+20:52:50.7 |
HIP 118167 |
9.78 |
| 2026-08-08 12:00 |
23:58:42.62 |
+20:53:58.1 |
HIP 118167 |
8.19 |
| 2026-08-09 00:00 |
23:58:33.14 |
+20:55:04.2 |
HIP 118167 |
7.06 |
| 2026-08-09 12:00 |
23:58:23.51 |
+20:56:08.7 |
HIP 118167 |
6.66 |
| 2026-08-10 00:00 |
23:58:13.72 |
+20:57:11.9 |
HIP 118167 |
7.13 |
| 2026-08-10 12:00 |
23:58:03.77 |
+20:58:13.6 |
HIP 118167 |
8.36 |
| 2026-08-11 00:00 |
23:57:53.67 |
+20:59:13.8 |
HIP 118167 |
10.08 |
| 2026-08-11 12:00 |
23:57:43.42 |
+21:00:12.5 |
HIP 118167 |
12.10 |
| 2026-08-12 00:00 |
23:57:33.01 |
+21:01:09.7 |
HIP 118167 |
14.31 |
| 2026-08-12 12:00 |
23:57:22.45 |
+21:02:05.5 |
HIP 118167 |
16.64 |
| 2026-08-13 00:00 |
23:57:11.74 |
+21:02:59.7 |
HIP 117990 |
18.47 |
| 2026-08-13 12:00 |
23:57:00.88 |
+21:03:52.5 |
HIP 117990 |
15.79 |
| 2026-08-14 00:00 |
23:56:49.88 |
+21:04:43.7 |
HIP 117990 |
13.10 |
| 2026-08-14 12:00 |
23:56:38.72 |
+21:05:33.5 |
HIP 117990 |
10.39 |
| 2026-08-15 00:00 |
23:56:27.43 |
+21:06:21.7 |
HIP 117990 |
7.67 |
| 2026-08-15 12:00 |
23:56:15.99 |
+21:07:08.4 |
HIP 117990 |
4.98 |
| 2026-08-16 00:00 |
23:56:04.40 |
+21:07:53.5 |
HIP 117990 |
2.50 |
| 2026-08-16 12:00 |
23:55:52.68 |
+21:08:37.2 |
HIP 117990 |
1.88 |
| 2026-08-17 00:00 |
23:55:40.82 |
+21:09:19.3 |
HIP 117990 |
4.14 |
| 2026-08-17 12:00 |
23:55:28.82 |
+21:09:59.8 |
HIP 117990 |
6.89 |
| 2026-08-18 00:00 |
23:55:16.68 |
+21:10:38.8 |
HIP 117990 |
9.74 |
| 2026-08-18 12:00 |
23:55:04.41 |
+21:11:16.3 |
HIP 117990 |
12.65 |
| 2026-08-19 00:00 |
23:54:52.01 |
+21:11:52.2 |
HIP 117990 |
15.59 |