C/2019 Y5 (PANSTARRS)
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) |
| 2026-02-03 00:00 |
01:05:13.47 |
+71:25:38.5 |
HIP 4856 |
20.01 |
| 2026-02-03 12:00 |
01:05:20.70 |
+71:24:33.2 |
HIP 4856 |
21.21 |
| 2026-02-04 00:00 |
01:05:28.09 |
+71:23:28.5 |
HIP 4856 |
22.42 |
| 2026-02-04 12:00 |
01:05:35.62 |
+71:22:24.4 |
HIP 4856 |
23.63 |
| 2026-02-05 00:00 |
01:05:43.30 |
+71:21:20.9 |
HIP 4856 |
24.84 |
| 2026-02-05 12:00 |
01:05:51.13 |
+71:20:17.9 |
HIP 5233 |
24.95 |
| 2026-02-06 00:00 |
01:05:59.10 |
+71:19:15.6 |
HIP 5233 |
23.81 |
| 2026-02-06 12:00 |
01:06:07.22 |
+71:18:13.9 |
HIP 5233 |
22.68 |
| 2026-02-07 00:00 |
01:06:15.48 |
+71:17:12.8 |
HIP 5233 |
21.57 |
| 2026-02-07 12:00 |
01:06:23.89 |
+71:16:12.3 |
HIP 5233 |
20.47 |
| 2026-02-08 00:00 |
01:06:32.44 |
+71:15:12.4 |
HIP 5233 |
19.41 |
| 2026-02-08 12:00 |
01:06:41.12 |
+71:14:13.2 |
HIP 5233 |
18.37 |
| 2026-02-09 00:00 |
01:06:49.95 |
+71:13:14.5 |
HIP 5233 |
17.36 |
| 2026-02-09 12:00 |
01:06:58.91 |
+71:12:16.6 |
HIP 5233 |
16.39 |
| 2026-02-10 00:00 |
01:07:08.01 |
+71:11:19.2 |
HIP 5233 |
15.47 |
| 2026-02-10 12:00 |
01:07:17.25 |
+71:10:22.5 |
HIP 5233 |
14.60 |
| 2026-02-11 00:00 |
01:07:26.62 |
+71:09:26.4 |
HIP 5233 |
13.80 |
| 2026-02-11 12:00 |
01:07:36.12 |
+71:08:30.9 |
HIP 5233 |
13.06 |
| 2026-02-12 00:00 |
01:07:45.76 |
+71:07:36.2 |
HIP 5233 |
12.42 |
| 2026-02-12 12:00 |
01:07:55.53 |
+71:06:42.0 |
HIP 5233 |
11.88 |
| 2026-02-13 00:00 |
01:08:05.42 |
+71:05:48.6 |
HIP 5233 |
11.46 |
| 2026-02-13 12:00 |
01:08:15.45 |
+71:04:55.7 |
HIP 5233 |
11.16 |
| 2026-02-14 00:00 |
01:08:25.60 |
+71:04:03.6 |
HIP 5233 |
11.01 |
| 2026-02-14 12:00 |
01:08:35.88 |
+71:03:12.1 |
HIP 5233 |
11.00 |
| 2026-02-15 00:00 |
01:08:46.29 |
+71:02:21.3 |
HIP 5233 |
11.14 |
| 2026-02-15 12:00 |
01:08:56.82 |
+71:01:31.1 |
HIP 5233 |
11.41 |
| 2026-02-16 00:00 |
01:09:07.47 |
+71:00:41.7 |
HIP 5233 |
11.82 |
| 2026-02-16 12:00 |
01:09:18.24 |
+70:59:52.9 |
HIP 5233 |
12.35 |
| 2026-02-17 00:00 |
01:09:29.14 |
+70:59:04.8 |
HIP 5233 |
12.97 |
| 2026-02-17 12:00 |
01:09:40.15 |
+70:58:17.4 |
HIP 5233 |
13.69 |
| 2026-02-18 00:00 |
01:09:51.28 |
+70:57:30.7 |
HIP 5233 |
14.48 |
| 2026-02-18 12:00 |
01:10:02.53 |
+70:56:44.6 |
HIP 5233 |
15.34 |
| 2026-02-19 00:00 |
01:10:13.90 |
+70:55:59.3 |
HIP 5233 |
16.25 |
| 2026-02-19 12:00 |
01:10:25.38 |
+70:55:14.6 |
HIP 5370 |
16.73 |
| 2026-02-20 00:00 |
01:10:36.97 |
+70:54:30.7 |
HIP 5370 |
16.63 |
| 2026-02-20 12:00 |
01:10:48.67 |
+70:53:47.5 |
HIP 5370 |
16.64 |
| 2026-02-21 00:00 |
01:11:00.49 |
+70:53:04.9 |
HIP 5370 |
16.75 |
| 2026-02-21 12:00 |
01:11:12.41 |
+70:52:23.1 |
HIP 5370 |
16.96 |
| 2026-02-22 00:00 |
01:11:24.44 |
+70:51:42.0 |
HIP 5370 |
17.27 |
| 2026-02-22 12:00 |
01:11:36.58 |
+70:51:01.6 |
HIP 5370 |
17.67 |
| 2026-02-23 00:00 |
01:11:48.83 |
+70:50:21.9 |
HIP 5370 |
18.15 |
| 2026-02-23 12:00 |
01:12:01.18 |
+70:49:42.9 |
HIP 5370 |
18.71 |
| 2026-02-24 00:00 |
01:12:13.63 |
+70:49:04.6 |
HIP 5370 |
19.35 |