메타데이터
| 항목 |
값 |
| Designation |
402P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-12-09T18:43:32.399040Z |
| Orbit solution date (soln_date, UTC) |
2026-07-06T12:12:49Z |
| Obs used |
2131 |
| NEO |
- |
| M1 |
5.500 |
| K1 |
14.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2013-02-18.0000000 |
| e |
0.43883859 |
| q (au) |
3.916225 |
| a (au) |
6.978785 |
| i (deg) |
30.894465 |
| Ω (om, deg) |
123.132102 |
| ω (w, deg) |
326.983777 |
| M (ma, deg) |
188.028800 |
밝기
산란 + 전체 선형
$$
M_a = (4.541 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
4.541 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.976 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2020-08-24 |
2021-12-09 |
+8.2871 |
-5.052 |
| 2021-12-11 |
2024-06-10 |
+1.5638 |
-1.208 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
15:02:34.23 |
+14:44:19.5 |
HIP 73574 |
21.28 |
| 2026-07-29 12:00 |
15:02:35.54 |
+14:42:14.3 |
HIP 73721 |
23.26 |
| 2026-07-30 00:00 |
15:02:36.98 |
+14:40:08.7 |
HIP 73721 |
23.31 |
| 2026-07-30 12:00 |
15:02:38.52 |
+14:38:02.7 |
HIP 73721 |
23.52 |
| 2026-07-31 00:00 |
15:02:40.18 |
+14:35:56.4 |
HIP 73721 |
23.90 |
| 2026-07-31 12:00 |
15:02:41.96 |
+14:33:49.8 |
HIP 73721 |
24.44 |
| 2026-08-01 00:00 |
15:02:43.84 |
+14:31:42.8 |
HIP 73721 |
25.14 |
| 2026-08-01 12:00 |
15:02:45.84 |
+14:29:35.5 |
HIP 73721 |
25.98 |
| 2026-08-02 00:00 |
15:02:47.96 |
+14:27:27.8 |
HIP 73721 |
26.95 |
| 2026-08-02 12:00 |
15:02:50.18 |
+14:25:19.9 |
HIP 73621 |
26.65 |
| 2026-08-03 00:00 |
15:02:52.52 |
+14:23:11.6 |
HIP 73621 |
24.48 |
| 2026-08-03 12:00 |
15:02:54.97 |
+14:21:03.1 |
HIP 73621 |
22.32 |
| 2026-08-04 00:00 |
15:02:57.53 |
+14:18:54.2 |
HIP 73621 |
20.17 |
| 2026-08-04 12:00 |
15:03:00.21 |
+14:16:45.1 |
HIP 73621 |
18.04 |
| 2026-08-05 00:00 |
15:03:02.99 |
+14:14:35.6 |
HIP 73621 |
15.93 |
| 2026-08-05 12:00 |
15:03:05.89 |
+14:12:25.9 |
HIP 73621 |
13.88 |
| 2026-08-06 00:00 |
15:03:08.90 |
+14:10:16.0 |
HIP 73621 |
11.91 |
| 2026-08-06 12:00 |
15:03:12.02 |
+14:08:05.8 |
HIP 73621 |
10.07 |
| 2026-08-07 00:00 |
15:03:15.25 |
+14:05:55.3 |
HIP 73621 |
8.48 |
| 2026-08-07 12:00 |
15:03:18.59 |
+14:03:44.6 |
HIP 73686 |
6.74 |
| 2026-08-08 00:00 |
15:03:22.04 |
+14:01:33.6 |
HIP 73686 |
5.16 |
| 2026-08-08 12:00 |
15:03:25.60 |
+13:59:22.5 |
HIP 73686 |
4.30 |
| 2026-08-09 00:00 |
15:03:29.28 |
+13:57:11.1 |
HIP 73686 |
4.61 |
| 2026-08-09 12:00 |
15:03:33.06 |
+13:54:59.4 |
HIP 73686 |
5.92 |
| 2026-08-10 00:00 |
15:03:36.95 |
+13:52:47.6 |
HIP 73686 |
7.76 |
| 2026-08-10 12:00 |
15:03:40.95 |
+13:50:35.6 |
HIP 73686 |
9.84 |
| 2026-08-11 00:00 |
15:03:45.06 |
+13:48:23.4 |
HIP 73686 |
12.05 |
| 2026-08-11 12:00 |
15:03:49.28 |
+13:46:11.0 |
HIP 73736 |
10.49 |
| 2026-08-12 00:00 |
15:03:53.61 |
+13:43:58.5 |
HIP 73736 |
8.23 |
| 2026-08-12 12:00 |
15:03:58.04 |
+13:41:45.8 |
HIP 73736 |
6.10 |
| 2026-08-13 00:00 |
15:04:02.59 |
+13:39:32.9 |
HIP 73736 |
4.31 |
| 2026-08-13 12:00 |
15:04:07.24 |
+13:37:19.9 |
HIP 73736 |
3.47 |
| 2026-08-14 00:00 |
15:04:11.99 |
+13:35:06.7 |
HIP 73736 |
4.21 |
| 2026-08-14 12:00 |
15:04:16.86 |
+13:32:53.4 |
HIP 73736 |
6.00 |
| 2026-08-15 00:00 |
15:04:21.83 |
+13:30:40.0 |
HIP 73736 |
8.18 |
| 2026-08-15 12:00 |
15:04:26.91 |
+13:28:26.4 |
HIP 73736 |
10.53 |
| 2026-08-16 00:00 |
15:04:32.09 |
+13:26:12.8 |
HIP 73736 |
12.96 |
| 2026-08-16 12:00 |
15:04:37.38 |
+13:23:59.0 |
HIP 73736 |
15.44 |
| 2026-08-17 00:00 |
15:04:42.77 |
+13:21:45.2 |
HIP 73736 |
17.95 |
| 2026-08-17 12:00 |
15:04:48.26 |
+13:19:31.3 |
HIP 73705 |
18.04 |
| 2026-08-18 00:00 |
15:04:53.86 |
+13:17:17.2 |
HIP 73705 |
17.54 |
| 2026-08-18 12:00 |
15:04:59.57 |
+13:15:03.2 |
HIP 73705 |
17.44 |
| 2026-08-19 00:00 |
15:05:05.37 |
+13:12:49.0 |
HIP 73705 |
17.76 |