메타데이터
| 항목 |
값 |
| Designation |
C/2019 Y5 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2019-08-18T04:08:32.138880Z |
| Orbit solution date (soln_date, UTC) |
2023-01-14T00:12:31Z |
| Obs used |
70 |
| NEO |
- |
| M1 |
13.000 |
| K1 |
7.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-12-28T05:41:07.382400Z |
| Discovery magnitude (MPC) |
21.47 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-07-16.0000000 |
| e |
0.99391885 |
| q (au) |
4.914443 |
| a (au) |
808.144135 |
| i (deg) |
82.832615 |
| Ω (om, deg) |
51.777609 |
| ω (w, deg) |
303.500296 |
| M (ma, deg) |
0.014279 |
밝기
산란 + 전체 선형
$$
M_a = (9.916 + 4.210\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
9.916 |
| n |
4.210 |
| gf |
0.998 |
| gb |
-0.918 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
02:05:56.00 |
+72:22:29.2 |
HIP 9598 |
11.66 |
| 2026-06-01 12:00 |
02:06:11.29 |
+72:23:54.7 |
HIP 9598 |
12.55 |
| 2026-06-02 00:00 |
02:06:26.51 |
+72:25:20.6 |
HIP 9598 |
13.61 |
| 2026-06-02 12:00 |
02:06:41.66 |
+72:26:46.9 |
HIP 9598 |
14.83 |
| 2026-06-03 00:00 |
02:06:56.74 |
+72:28:13.6 |
HIP 9598 |
16.15 |
| 2026-06-03 12:00 |
02:07:11.74 |
+72:29:40.7 |
HIP 9598 |
17.56 |
| 2026-06-04 00:00 |
02:07:26.67 |
+72:31:08.2 |
HIP 9598 |
19.03 |
| 2026-06-04 12:00 |
02:07:41.53 |
+72:32:36.2 |
HIP 9598 |
20.56 |
| 2026-06-05 00:00 |
02:07:56.31 |
+72:34:04.5 |
HIP 9598 |
22.14 |
| 2026-06-05 12:00 |
02:08:11.01 |
+72:35:33.2 |
HIP 9598 |
23.74 |
| 2026-06-06 00:00 |
02:08:25.63 |
+72:37:02.3 |
HIP 9598 |
25.38 |
| 2026-06-06 12:00 |
02:08:40.17 |
+72:38:31.9 |
HIP 9598 |
27.03 |
| 2026-06-07 00:00 |
02:08:54.63 |
+72:40:01.7 |
HIP 9598 |
28.71 |
| 2026-06-07 12:00 |
02:09:09.01 |
+72:41:32.0 |
HIP 9598 |
30.40 |
| 2026-06-08 00:00 |
02:09:23.31 |
+72:43:02.7 |
HIP 10158 |
32.09 |
| 2026-06-08 12:00 |
02:09:37.53 |
+72:44:33.7 |
HIP 10158 |
30.43 |
| 2026-06-09 00:00 |
02:09:51.65 |
+72:46:05.2 |
HIP 10158 |
28.78 |
| 2026-06-09 12:00 |
02:10:05.70 |
+72:47:36.9 |
HIP 10158 |
27.16 |
| 2026-06-10 00:00 |
02:10:19.65 |
+72:49:09.1 |
HIP 10158 |
25.55 |
| 2026-06-10 12:00 |
02:10:33.52 |
+72:50:41.6 |
HIP 10158 |
23.98 |
| 2026-06-11 00:00 |
02:10:47.29 |
+72:52:14.5 |
HIP 10158 |
22.44 |
| 2026-06-11 12:00 |
02:11:00.98 |
+72:53:47.8 |
HIP 10158 |
20.94 |
| 2026-06-12 00:00 |
02:11:14.57 |
+72:55:21.4 |
HIP 10158 |
19.49 |
| 2026-06-12 12:00 |
02:11:28.07 |
+72:56:55.3 |
HIP 10158 |
18.11 |
| 2026-06-13 00:00 |
02:11:41.47 |
+72:58:29.7 |
HIP 10158 |
16.81 |
| 2026-06-13 12:00 |
02:11:54.78 |
+73:00:04.3 |
HIP 10158 |
15.62 |
| 2026-06-14 00:00 |
02:12:07.99 |
+73:01:39.3 |
HIP 10158 |
14.55 |
| 2026-06-14 12:00 |
02:12:21.10 |
+73:03:14.7 |
HIP 10158 |
13.64 |
| 2026-06-15 00:00 |
02:12:34.12 |
+73:04:50.3 |
HIP 10158 |
12.92 |
| 2026-06-15 12:00 |
02:12:47.03 |
+73:06:26.3 |
HIP 10158 |
12.43 |
| 2026-06-16 00:00 |
02:12:59.84 |
+73:08:02.7 |
HIP 10158 |
12.19 |
| 2026-06-16 12:00 |
02:13:12.54 |
+73:09:39.3 |
HIP 10158 |
12.22 |
| 2026-06-17 00:00 |
02:13:25.14 |
+73:11:16.3 |
HIP 10158 |
12.52 |
| 2026-06-17 12:00 |
02:13:37.63 |
+73:12:53.6 |
HIP 10158 |
13.06 |
| 2026-06-18 00:00 |
02:13:50.02 |
+73:14:31.2 |
HIP 10158 |
13.82 |
| 2026-06-18 12:00 |
02:14:02.29 |
+73:16:09.1 |
HIP 10158 |
14.77 |
| 2026-06-19 00:00 |
02:14:14.46 |
+73:17:47.3 |
HIP 10691 |
14.63 |
| 2026-06-19 12:00 |
02:14:26.52 |
+73:19:25.8 |
HIP 10691 |
13.55 |
| 2026-06-20 00:00 |
02:14:38.46 |
+73:21:04.6 |
HIP 10691 |
12.67 |
| 2026-06-20 12:00 |
02:14:50.29 |
+73:22:43.7 |
HIP 10691 |
12.02 |
| 2026-06-21 00:00 |
02:15:02.01 |
+73:24:23.1 |
HIP 10691 |
11.65 |
| 2026-06-21 12:00 |
02:15:13.61 |
+73:26:02.7 |
HIP 10691 |
11.57 |
| 2026-06-22 00:00 |
02:15:25.09 |
+73:27:42.7 |
HIP 10691 |
11.81 |