메타데이터
| 항목 |
값 |
| Designation |
498P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-12-19T02:34:38.876160Z |
| Orbit solution date (soln_date, UTC) |
2025-04-11T14:45:22Z |
| Obs used |
368 |
| NEO |
- |
| M1 |
6.200 |
| K1 |
40.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2015-02-13T02:33:34.560000Z |
| Discovery magnitude (MPC) |
19.90 r |
| Discovery observatory (MPC) |
G45 · Space Surveillance Telescope, Atom Site |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2024-02-04.0000000 |
| e |
0.57239000 |
| q (au) |
1.963512 |
| a (au) |
4.591829 |
| i (deg) |
14.479162 |
| Ω (om, deg) |
279.253586 |
| ω (w, deg) |
179.143815 |
| M (ma, deg) |
328.035909 |
밝기
산란 + 전체 선형
$$
M_a = (18.691 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
18.691 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.685 |
| k |
0.800 |
| 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) |
| 2026-07-29 00:00 |
13:43:38.50 |
-23:31:27.0 |
HIP 66800 |
29.60 |
| 2026-07-29 12:00 |
13:43:53.59 |
-23:31:08.9 |
HIP 66800 |
32.99 |
| 2026-07-30 00:00 |
13:44:08.82 |
-23:30:52.0 |
HIP 66800 |
36.43 |
| 2026-07-30 12:00 |
13:44:24.20 |
-23:30:36.2 |
HIP 67267 |
38.65 |
| 2026-07-31 00:00 |
13:44:39.72 |
-23:30:21.6 |
HIP 67267 |
35.08 |
| 2026-07-31 12:00 |
13:44:55.39 |
-23:30:08.2 |
HIP 67267 |
31.49 |
| 2026-08-01 00:00 |
13:45:11.20 |
-23:29:55.9 |
HIP 67267 |
27.86 |
| 2026-08-01 12:00 |
13:45:27.15 |
-23:29:44.7 |
HIP 67267 |
24.19 |
| 2026-08-02 00:00 |
13:45:43.25 |
-23:29:34.7 |
HIP 67267 |
20.50 |
| 2026-08-02 12:00 |
13:45:59.48 |
-23:29:25.8 |
HIP 67267 |
16.77 |
| 2026-08-03 00:00 |
13:46:15.86 |
-23:29:18.0 |
HIP 67267 |
13.02 |
| 2026-08-03 12:00 |
13:46:32.37 |
-23:29:11.3 |
HIP 67267 |
9.23 |
| 2026-08-04 00:00 |
13:46:49.02 |
-23:29:05.8 |
HIP 67267 |
5.42 |
| 2026-08-04 12:00 |
13:47:05.80 |
-23:29:01.3 |
HIP 67267 |
1.62 |
| 2026-08-05 00:00 |
13:47:22.72 |
-23:28:58.0 |
HIP 67267 |
2.38 |
| 2026-08-05 12:00 |
13:47:39.78 |
-23:28:55.7 |
HIP 67311 |
3.95 |
| 2026-08-06 00:00 |
13:47:56.97 |
-23:28:54.5 |
HIP 67311 |
4.84 |
| 2026-08-06 12:00 |
13:48:14.29 |
-23:28:54.4 |
HIP 67311 |
7.93 |
| 2026-08-07 00:00 |
13:48:31.75 |
-23:28:55.4 |
HIP 67311 |
11.60 |
| 2026-08-07 12:00 |
13:48:49.34 |
-23:28:57.4 |
HIP 67311 |
15.48 |
| 2026-08-08 00:00 |
13:49:07.05 |
-23:29:00.5 |
HIP 67311 |
19.45 |
| 2026-08-08 12:00 |
13:49:24.90 |
-23:29:04.7 |
HIP 67570 |
19.25 |
| 2026-08-09 00:00 |
13:49:42.88 |
-23:29:09.9 |
HIP 67570 |
15.19 |
| 2026-08-09 12:00 |
13:50:00.98 |
-23:29:16.2 |
HIP 67570 |
11.16 |
| 2026-08-10 00:00 |
13:50:19.22 |
-23:29:23.4 |
HIP 67570 |
7.24 |
| 2026-08-10 12:00 |
13:50:37.57 |
-23:29:31.8 |
HIP 67570 |
3.91 |
| 2026-08-11 00:00 |
13:50:56.06 |
-23:29:41.1 |
HIP 67570 |
3.72 |
| 2026-08-11 12:00 |
13:51:14.67 |
-23:29:51.5 |
HIP 67570 |
6.99 |
| 2026-08-12 00:00 |
13:51:33.40 |
-23:30:02.9 |
HIP 67570 |
11.01 |
| 2026-08-12 12:00 |
13:51:52.26 |
-23:30:15.3 |
HIP 67570 |
15.21 |
| 2026-08-13 00:00 |
13:52:11.23 |
-23:30:28.7 |
HIP 67777 |
12.79 |
| 2026-08-13 12:00 |
13:52:30.33 |
-23:30:43.0 |
HIP 67777 |
8.41 |
| 2026-08-14 00:00 |
13:52:49.55 |
-23:30:58.4 |
HIP 67777 |
4.01 |
| 2026-08-14 12:00 |
13:53:08.88 |
-23:31:14.7 |
HIP 67777 |
0.62 |
| 2026-08-15 00:00 |
13:53:28.34 |
-23:31:32.0 |
HIP 67777 |
4.94 |
| 2026-08-15 12:00 |
13:53:47.91 |
-23:31:50.3 |
HIP 67868 |
3.46 |
| 2026-08-16 00:00 |
13:54:07.60 |
-23:32:09.5 |
HIP 67868 |
1.21 |
| 2026-08-16 12:00 |
13:54:27.40 |
-23:32:29.7 |
HIP 67868 |
5.67 |
| 2026-08-17 00:00 |
13:54:47.31 |
-23:32:50.8 |
HIP 67971 |
8.97 |
| 2026-08-17 12:00 |
13:55:07.34 |
-23:33:12.9 |
HIP 67971 |
6.88 |
| 2026-08-18 00:00 |
13:55:27.48 |
-23:33:35.8 |
HIP 67971 |
7.52 |
| 2026-08-18 12:00 |
13:55:47.73 |
-23:33:59.7 |
HIP 67971 |
10.44 |
| 2026-08-19 00:00 |
13:56:08.09 |
-23:34:24.5 |
HIP 67971 |
14.32 |