메타데이터
| 항목 |
값 |
| Designation |
P/2019 X2 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-12-09T07:29:31.522560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:34:01Z |
| Obs used |
49 |
| NEO |
- |
| M1 |
18.100 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-12-04T13:53:07.584000Z |
| Discovery magnitude (MPC) |
21.60 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2019-12-28.0000000 |
| e |
0.49925561 |
| q (au) |
1.824131 |
| a (au) |
3.642840 |
| i (deg) |
15.881613 |
| Ω (om, deg) |
250.856818 |
| ω (w, deg) |
213.558832 |
| M (ma, deg) |
2.649128 |
밝기
산란 + 전체 선형
$$
M_a = (20.000 + 3.550\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
20.000 |
| n |
3.550 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.936 |
| 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) |
| 2026-06-01 00:00 |
02:46:58.96 |
+23:06:27.6 |
HIP 13012 |
9.61 |
| 2026-06-01 12:00 |
02:48:03.40 |
+23:09:42.6 |
HIP 13012 |
16.37 |
| 2026-06-02 00:00 |
02:49:07.96 |
+23:12:56.4 |
HIP 13012 |
30.08 |
| 2026-06-02 12:00 |
02:50:12.62 |
+23:16:09.0 |
HIP 13242 |
24.69 |
| 2026-06-03 00:00 |
02:51:17.39 |
+23:19:20.5 |
HIP 13362 |
13.69 |
| 2026-06-03 12:00 |
02:52:22.28 |
+23:22:30.8 |
HIP 13362 |
15.08 |
| 2026-06-04 00:00 |
02:53:27.27 |
+23:25:39.9 |
HIP 13362 |
27.06 |
| 2026-06-04 12:00 |
02:54:32.38 |
+23:28:47.7 |
HIP 13547 |
22.07 |
| 2026-06-05 00:00 |
02:55:37.60 |
+23:31:54.3 |
HIP 13547 |
24.81 |
| 2026-06-05 12:00 |
02:56:42.92 |
+23:34:59.6 |
HIP 13801 |
26.56 |
| 2026-06-06 00:00 |
02:57:48.36 |
+23:38:03.7 |
HIP 13801 |
19.74 |
| 2026-06-06 12:00 |
02:58:53.91 |
+23:41:06.5 |
HIP 13801 |
23.28 |
| 2026-06-07 00:00 |
02:59:59.56 |
+23:44:08.0 |
HIP 13867 |
30.59 |
| 2026-06-07 12:00 |
03:01:05.33 |
+23:47:08.2 |
HIP 14129 |
26.56 |
| 2026-06-08 00:00 |
03:02:11.21 |
+23:50:07.1 |
HIP 14129 |
24.46 |
| 2026-06-08 12:00 |
03:03:17.20 |
+23:53:04.7 |
HIP 14129 |
31.04 |
| 2026-06-09 00:00 |
03:04:23.29 |
+23:56:00.9 |
HIP 14451 |
34.22 |
| 2026-06-09 12:00 |
03:05:29.50 |
+23:58:55.7 |
HIP 14451 |
20.35 |
| 2026-06-10 00:00 |
03:06:35.82 |
+24:01:49.2 |
HIP 14451 |
11.49 |
| 2026-06-10 12:00 |
03:07:42.24 |
+24:04:41.3 |
HIP 14451 |
18.04 |
| 2026-06-11 00:00 |
03:08:48.78 |
+24:07:31.9 |
HIP 14554 |
29.26 |
| 2026-06-11 12:00 |
03:09:55.42 |
+24:10:21.2 |
HIP 14847 |
27.24 |
| 2026-06-12 00:00 |
03:11:02.17 |
+24:13:09.0 |
HIP 14847 |
16.93 |
| 2026-06-12 12:00 |
03:12:09.03 |
+24:15:55.4 |
HIP 14847 |
17.62 |
| 2026-06-13 00:00 |
03:13:16.00 |
+24:18:40.3 |
HIP 15057 |
10.70 |
| 2026-06-13 12:00 |
03:14:23.07 |
+24:21:23.7 |
HIP 15057 |
7.38 |
| 2026-06-14 00:00 |
03:15:30.25 |
+24:24:05.6 |
HIP 15181 |
8.80 |
| 2026-06-14 12:00 |
03:16:37.53 |
+24:26:46.0 |
HIP 15181 |
14.36 |
| 2026-06-15 00:00 |
03:17:44.92 |
+24:29:24.9 |
HIP 15361 |
23.64 |
| 2026-06-15 12:00 |
03:18:52.42 |
+24:32:02.2 |
HIP 15560 |
21.48 |
| 2026-06-16 00:00 |
03:20:00.02 |
+24:34:38.0 |
HIP 15560 |
6.43 |
| 2026-06-16 12:00 |
03:21:07.72 |
+24:37:12.2 |
HIP 15560 |
10.38 |
| 2026-06-17 00:00 |
03:22:15.53 |
+24:39:44.9 |
HIP 15560 |
25.72 |
| 2026-06-17 12:00 |
03:23:23.43 |
+24:42:15.9 |
HIP 15861 |
12.55 |
| 2026-06-18 00:00 |
03:24:31.45 |
+24:44:45.3 |
HIP 15861 |
3.22 |
| 2026-06-18 12:00 |
03:25:39.56 |
+24:47:13.1 |
HIP 16071 |
18.25 |
| 2026-06-19 00:00 |
03:26:47.78 |
+24:49:39.3 |
HIP 16071 |
2.64 |
| 2026-06-19 12:00 |
03:27:56.09 |
+24:52:03.7 |
HIP 16071 |
13.13 |
| 2026-06-20 00:00 |
03:29:04.51 |
+24:54:26.6 |
HIP 16071 |
28.82 |
| 2026-06-20 12:00 |
03:30:13.03 |
+24:56:47.7 |
HIP 16407 |
23.38 |
| 2026-06-21 00:00 |
03:31:21.65 |
+24:59:07.1 |
HIP 16407 |
16.27 |
| 2026-06-21 12:00 |
03:32:30.37 |
+25:01:24.8 |
HIP 16407 |
21.85 |
| 2026-06-22 00:00 |
03:33:39.19 |
+25:03:40.8 |
HIP 16635 |
11.97 |