메타데이터
| 항목 |
값 |
| Designation |
P/2015 A3 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-02-22T20:59:44.802240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:05Z |
| Obs used |
57 |
| NEO |
Yes |
| M1 |
20.700 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-02-14.0000000 |
| e |
0.84590960 |
| q (au) |
1.152929 |
| a (au) |
7.482163 |
| i (deg) |
172.510659 |
| Ω (om, deg) |
277.075159 |
| ω (w, deg) |
249.619923 |
| M (ma, deg) |
359.572611 |
밝기
산란 + 전체 선형
$$
M_a = (20.000 + 3.323\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
20.000 |
| n |
3.323 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.939 |
| 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 |
13:29:50.41 |
-01:19:23.8 |
HIP 65840 |
4.49 |
| 2026-06-01 12:00 |
13:29:43.65 |
-01:18:57.0 |
HIP 65840 |
4.95 |
| 2026-06-02 00:00 |
13:29:36.94 |
-01:18:30.7 |
HIP 65840 |
5.90 |
| 2026-06-02 12:00 |
13:29:30.29 |
-01:18:04.8 |
HIP 65796 |
5.38 |
| 2026-06-03 00:00 |
13:29:23.69 |
-01:17:39.4 |
HIP 65796 |
4.74 |
| 2026-06-03 12:00 |
13:29:17.16 |
-01:17:14.4 |
HIP 65796 |
4.65 |
| 2026-06-04 00:00 |
13:29:10.68 |
-01:16:49.8 |
HIP 65796 |
5.14 |
| 2026-06-04 12:00 |
13:29:04.27 |
-01:16:25.6 |
HIP 65796 |
6.05 |
| 2026-06-05 00:00 |
13:28:57.91 |
-01:16:01.9 |
HIP 65796 |
7.21 |
| 2026-06-05 12:00 |
13:28:51.62 |
-01:15:38.7 |
HIP 65796 |
8.52 |
| 2026-06-06 00:00 |
13:28:45.38 |
-01:15:15.8 |
HIP 65796 |
9.90 |
| 2026-06-06 12:00 |
13:28:39.21 |
-01:14:53.5 |
HIP 65796 |
11.33 |
| 2026-06-07 00:00 |
13:28:33.09 |
-01:14:31.5 |
HIP 65796 |
12.77 |
| 2026-06-07 12:00 |
13:28:27.04 |
-01:14:10.1 |
HIP 65796 |
14.23 |
| 2026-06-08 00:00 |
13:28:21.05 |
-01:13:49.0 |
HIP 65796 |
15.69 |
| 2026-06-08 12:00 |
13:28:15.12 |
-01:13:28.4 |
HIP 65796 |
17.14 |
| 2026-06-09 00:00 |
13:28:09.26 |
-01:13:08.3 |
HIP 65796 |
18.59 |
| 2026-06-09 12:00 |
13:28:03.46 |
-01:12:48.6 |
HIP 65796 |
20.03 |
| 2026-06-10 00:00 |
13:27:57.72 |
-01:12:29.3 |
HIP 65796 |
21.45 |
| 2026-06-10 12:00 |
13:27:52.04 |
-01:12:10.5 |
HIP 65708 |
22.81 |
| 2026-06-11 00:00 |
13:27:46.43 |
-01:11:52.2 |
HIP 65708 |
22.97 |
| 2026-06-11 12:00 |
13:27:40.88 |
-01:11:34.3 |
HIP 65545 |
22.35 |
| 2026-06-12 00:00 |
13:27:35.40 |
-01:11:16.8 |
HIP 65545 |
20.98 |
| 2026-06-12 12:00 |
13:27:29.98 |
-01:10:59.8 |
HIP 65545 |
19.63 |
| 2026-06-13 00:00 |
13:27:24.62 |
-01:10:43.3 |
HIP 65545 |
18.30 |
| 2026-06-13 12:00 |
13:27:19.34 |
-01:10:27.2 |
HIP 65545 |
17.00 |
| 2026-06-14 00:00 |
13:27:14.11 |
-01:10:11.6 |
HIP 65545 |
15.71 |
| 2026-06-14 12:00 |
13:27:08.96 |
-01:09:56.4 |
HIP 65545 |
14.46 |
| 2026-06-15 00:00 |
13:27:03.87 |
-01:09:41.6 |
HIP 65545 |
13.22 |
| 2026-06-15 12:00 |
13:26:58.84 |
-01:09:27.4 |
HIP 65545 |
12.02 |
| 2026-06-16 00:00 |
13:26:53.88 |
-01:09:13.5 |
HIP 65545 |
10.85 |
| 2026-06-16 12:00 |
13:26:48.99 |
-01:09:00.2 |
HIP 65545 |
9.72 |
| 2026-06-17 00:00 |
13:26:44.17 |
-01:08:47.3 |
HIP 65545 |
8.62 |
| 2026-06-17 12:00 |
13:26:39.41 |
-01:08:34.8 |
HIP 65545 |
7.59 |
| 2026-06-18 00:00 |
13:26:34.72 |
-01:08:22.8 |
HIP 65545 |
6.62 |
| 2026-06-18 12:00 |
13:26:30.10 |
-01:08:11.2 |
HIP 65545 |
5.74 |
| 2026-06-19 00:00 |
13:26:25.55 |
-01:08:00.1 |
HIP 65545 |
4.99 |
| 2026-06-19 12:00 |
13:26:21.06 |
-01:07:49.4 |
HIP 65545 |
4.43 |
| 2026-06-20 00:00 |
13:26:16.64 |
-01:07:39.2 |
HIP 65545 |
4.10 |
| 2026-06-20 12:00 |
13:26:12.30 |
-01:07:29.5 |
HIP 65545 |
4.06 |
| 2026-06-21 00:00 |
13:26:08.01 |
-01:07:20.2 |
HIP 65545 |
4.30 |
| 2026-06-21 12:00 |
13:26:03.80 |
-01:07:11.3 |
HIP 65545 |
4.76 |
| 2026-06-22 00:00 |
13:25:59.66 |
-01:07:02.9 |
HIP 65545 |
5.38 |