메타데이터
| 항목 |
값 |
| Designation |
P/2019 A4 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-12-05T05:23:53.433600Z |
| Orbit solution date (soln_date, UTC) |
2022-06-07T21:45:21Z |
| Obs used |
85 |
| NEO |
- |
| M1 |
15.500 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-01-10T08:46:05.376000Z |
| Discovery magnitude (MPC) |
20.60 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2019-01-18.0000000 |
| e |
0.08960737 |
| q (au) |
2.379288 |
| a (au) |
2.613474 |
| i (deg) |
13.318898 |
| Ω (om, deg) |
119.300120 |
| ω (w, deg) |
341.836468 |
| M (ma, deg) |
10.211830 |
밝기
산란 + 전체 선형
$$
M_a = (13.420 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.420 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.849 |
| k |
0.999 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
01:14:28.63 |
-02:11:08.4 |
HIP 5771 |
7.34 |
| 2026-05-12 12:00 |
01:15:16.59 |
-02:07:22.9 |
HIP 5771 |
17.95 |
| 2026-05-13 00:00 |
01:16:04.53 |
-02:03:38.2 |
HIP 5985 |
18.86 |
| 2026-05-13 12:00 |
01:16:52.44 |
-01:59:54.3 |
HIP 5985 |
16.90 |
| 2026-05-14 00:00 |
01:17:40.34 |
-01:56:11.2 |
HIP 5985 |
23.01 |
| 2026-05-14 12:00 |
01:18:28.20 |
-01:52:28.9 |
HIP 5956 |
31.13 |
| 2026-05-15 00:00 |
01:19:16.05 |
-01:48:47.5 |
HIP 6302 |
38.69 |
| 2026-05-15 12:00 |
01:20:03.87 |
-01:45:06.9 |
HIP 6302 |
29.19 |
| 2026-05-16 00:00 |
01:20:51.67 |
-01:41:27.1 |
HIP 6302 |
22.82 |
| 2026-05-16 12:00 |
01:21:39.44 |
-01:37:48.2 |
HIP 6368 |
22.13 |
| 2026-05-17 00:00 |
01:22:27.18 |
-01:34:10.2 |
HIP 6368 |
27.42 |
| 2026-05-17 12:00 |
01:23:14.90 |
-01:30:33.0 |
HIP 6368 |
36.38 |
| 2026-05-18 00:00 |
01:24:02.59 |
-01:26:56.7 |
HIP 6639 |
28.78 |
| 2026-05-18 12:00 |
01:24:50.26 |
-01:23:21.3 |
HIP 6639 |
20.40 |
| 2026-05-19 00:00 |
01:25:37.89 |
-01:19:46.7 |
HIP 6639 |
17.71 |
| 2026-05-19 12:00 |
01:26:25.50 |
-01:16:13.1 |
HIP 6639 |
22.82 |
| 2026-05-20 00:00 |
01:27:13.08 |
-01:12:40.4 |
HIP 6884 |
23.71 |
| 2026-05-20 12:00 |
01:28:00.63 |
-01:09:08.6 |
HIP 6884 |
11.50 |
| 2026-05-21 00:00 |
01:28:48.15 |
-01:05:37.7 |
HIP 6884 |
3.08 |
| 2026-05-21 12:00 |
01:29:35.64 |
-01:02:07.7 |
HIP 6884 |
13.91 |
| 2026-05-22 00:00 |
01:30:23.10 |
-00:58:38.6 |
HIP 7028 |
8.79 |
| 2026-05-22 12:00 |
01:31:10.53 |
-00:55:10.5 |
HIP 7028 |
10.39 |
| 2026-05-23 00:00 |
01:31:57.93 |
-00:51:43.3 |
HIP 7028 |
21.07 |
| 2026-05-23 12:00 |
01:32:45.29 |
-00:48:17.0 |
HIP 7028 |
32.92 |
| 2026-05-24 00:00 |
01:33:32.63 |
-00:44:51.7 |
HIP 7028 |
45.02 |
| 2026-05-24 12:00 |
01:34:19.93 |
-00:41:27.4 |
HIP 7527 |
39.65 |
| 2026-05-25 00:00 |
01:35:07.21 |
-00:38:04.0 |
HIP 7527 |
27.36 |
| 2026-05-25 12:00 |
01:35:54.45 |
-00:34:41.6 |
HIP 7527 |
15.11 |
| 2026-05-26 00:00 |
01:36:41.65 |
-00:31:20.1 |
HIP 7527 |
3.08 |
| 2026-05-26 12:00 |
01:37:28.83 |
-00:27:59.6 |
HIP 7549 |
7.67 |
| 2026-05-27 00:00 |
01:38:15.97 |
-00:24:40.1 |
HIP 7549 |
15.39 |
| 2026-05-27 12:00 |
01:39:03.08 |
-00:21:21.6 |
HIP 7779 |
17.38 |
| 2026-05-28 00:00 |
01:39:50.16 |
-00:18:04.1 |
HIP 7779 |
5.50 |
| 2026-05-28 12:00 |
01:40:37.20 |
-00:14:47.5 |
HIP 7779 |
7.55 |
| 2026-05-29 00:00 |
01:41:24.20 |
-00:11:32.0 |
HIP 7880 |
18.87 |
| 2026-05-29 12:00 |
01:42:11.18 |
-00:08:17.5 |
HIP 7880 |
25.26 |
| 2026-05-30 00:00 |
01:42:58.11 |
-00:05:03.9 |
HIP 8098 |
16.26 |
| 2026-05-30 12:00 |
01:43:45.02 |
-00:01:51.4 |
HIP 8098 |
9.08 |
| 2026-05-31 00:00 |
01:44:31.88 |
+00:01:20.0 |
HIP 8098 |
13.98 |
| 2026-05-31 12:00 |
01:45:18.71 |
+00:04:30.5 |
HIP 8274 |
19.92 |
| 2026-06-01 00:00 |
01:46:05.51 |
+00:07:39.9 |
HIP 8274 |
8.15 |
| 2026-06-01 12:00 |
01:46:52.27 |
+00:10:48.2 |
HIP 8274 |
5.43 |
| 2026-06-02 00:00 |
01:47:38.99 |
+00:13:55.6 |
HIP 8341 |
4.68 |