메타데이터
| 항목 |
값 |
| Designation |
158P/Kowal-LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-09-25T04:18:05.472000Z |
| Orbit solution date (soln_date, UTC) |
2025-02-13T09:13:06Z |
| Obs used |
1093 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
13.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-07-12.0000000 |
| e |
0.03060860 |
| q (au) |
4.576459 |
| a (au) |
4.720961 |
| i (deg) |
7.907531 |
| Ω (om, deg) |
137.306066 |
| ω (w, deg) |
232.612379 |
| M (ma, deg) |
352.776355 |
밝기
산란 + 전체 선형
$$
M_a = (5.344 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
5.344 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.957 |
| 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 |
| 2018-02-14 |
2025-01-25 |
+18.3296 |
-12.712 |
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 |
07:35:04.30 |
+20:02:25.3 |
HIP 36925 |
13.21 |
| 2026-07-29 12:00 |
07:35:28.85 |
+20:01:40.7 |
HIP 36925 |
11.40 |
| 2026-07-30 00:00 |
07:35:53.37 |
+20:00:55.9 |
HIP 36925 |
12.37 |
| 2026-07-30 12:00 |
07:36:17.87 |
+20:00:10.9 |
HIP 37072 |
14.50 |
| 2026-07-31 00:00 |
07:36:42.33 |
+19:59:25.7 |
HIP 37072 |
11.38 |
| 2026-07-31 12:00 |
07:37:06.76 |
+19:58:40.3 |
HIP 37072 |
10.76 |
| 2026-08-01 00:00 |
07:37:31.16 |
+19:57:54.6 |
HIP 37072 |
13.00 |
| 2026-08-01 12:00 |
07:37:55.53 |
+19:57:08.8 |
HIP 37072 |
17.00 |
| 2026-08-02 00:00 |
07:38:19.87 |
+19:56:22.8 |
HIP 37295 |
18.49 |
| 2026-08-02 12:00 |
07:38:44.17 |
+19:55:36.7 |
HIP 37295 |
13.40 |
| 2026-08-03 00:00 |
07:39:08.44 |
+19:54:50.3 |
HIP 37295 |
9.14 |
| 2026-08-03 12:00 |
07:39:32.68 |
+19:54:03.7 |
HIP 37295 |
7.34 |
| 2026-08-04 00:00 |
07:39:56.88 |
+19:53:17.0 |
HIP 37295 |
9.50 |
| 2026-08-04 12:00 |
07:40:21.05 |
+19:52:30.1 |
HIP 37295 |
13.87 |
| 2026-08-05 00:00 |
07:40:45.18 |
+19:51:43.0 |
HIP 37412 |
16.40 |
| 2026-08-05 12:00 |
07:41:09.28 |
+19:50:55.7 |
HIP 37412 |
16.11 |
| 2026-08-06 00:00 |
07:41:33.34 |
+19:50:08.3 |
HIP 37412 |
17.77 |
| 2026-08-06 12:00 |
07:41:57.36 |
+19:49:20.7 |
HIP 37412 |
20.90 |
| 2026-08-07 00:00 |
07:42:21.34 |
+19:48:32.9 |
HIP 37412 |
24.95 |
| 2026-08-07 12:00 |
07:42:45.29 |
+19:47:45.0 |
HIP 37412 |
29.54 |
| 2026-08-08 00:00 |
07:43:09.19 |
+19:46:56.9 |
HIP 37722 |
29.39 |
| 2026-08-08 12:00 |
07:43:33.06 |
+19:46:08.6 |
HIP 37722 |
27.67 |
| 2026-08-09 00:00 |
07:43:56.88 |
+19:45:20.2 |
HIP 37722 |
27.06 |
| 2026-08-09 12:00 |
07:44:20.67 |
+19:44:31.7 |
HIP 37722 |
27.62 |
| 2026-08-10 00:00 |
07:44:44.40 |
+19:43:43.0 |
HIP 37722 |
29.28 |
| 2026-08-10 12:00 |
07:45:08.10 |
+19:42:54.2 |
HIP 37722 |
31.86 |
| 2026-08-11 00:00 |
07:45:31.75 |
+19:42:05.2 |
HIP 37722 |
35.16 |
| 2026-08-11 12:00 |
07:45:55.36 |
+19:41:16.1 |
HIP 37722 |
38.99 |
| 2026-08-12 00:00 |
07:46:18.93 |
+19:40:26.9 |
HIP 38163 |
41.48 |
| 2026-08-12 12:00 |
07:46:42.44 |
+19:39:37.5 |
HIP 38163 |
36.15 |
| 2026-08-13 00:00 |
07:47:05.91 |
+19:38:48.0 |
HIP 38163 |
30.92 |
| 2026-08-13 12:00 |
07:47:29.33 |
+19:37:58.4 |
HIP 38163 |
25.85 |
| 2026-08-14 00:00 |
07:47:52.71 |
+19:37:08.7 |
HIP 38163 |
21.05 |
| 2026-08-14 12:00 |
07:48:16.03 |
+19:36:18.8 |
HIP 38163 |
16.74 |
| 2026-08-15 00:00 |
07:48:39.30 |
+19:35:28.9 |
HIP 38163 |
13.38 |
| 2026-08-15 12:00 |
07:49:02.53 |
+19:34:38.8 |
HIP 38163 |
11.81 |
| 2026-08-16 00:00 |
07:49:25.70 |
+19:33:48.7 |
HIP 38163 |
12.69 |
| 2026-08-16 12:00 |
07:49:48.82 |
+19:32:58.4 |
HIP 38252 |
9.85 |
| 2026-08-17 00:00 |
07:50:11.89 |
+19:32:08.0 |
HIP 38252 |
7.59 |
| 2026-08-17 12:00 |
07:50:34.90 |
+19:31:17.6 |
HIP 38252 |
8.87 |
| 2026-08-18 00:00 |
07:50:57.87 |
+19:30:27.1 |
HIP 38252 |
12.63 |
| 2026-08-18 12:00 |
07:51:20.77 |
+19:29:36.5 |
HIP 38394 |
13.20 |
| 2026-08-19 00:00 |
07:51:43.62 |
+19:28:45.8 |
HIP 38394 |
9.76 |